From 7245716d7969142ccc8d24ff874a7e0549273a50 Mon Sep 17 00:00:00 2001
From: jeong da-young <bja05008@gmail.com>
Date: Tue, 21 Oct 2025 10:47:18 +0900
Subject: [PATCH] =?UTF-8?q?=EB=B6=88=ED=95=84=EC=9A=94=ED=95=9C=20?=
 =?UTF-8?q?=EC=86=8C=EC=8A=A4=20=EC=A0=95=EB=A6=AC?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 .../cloud/resource/ServerResourceBase.java    | 392 ++++++++----------
 .../resource/LibvirtComputingResource.java    |   6 +-
 .../cloud/server/ManagementServerImpl.java    | 174 +-------
 3 files changed, 178 insertions(+), 394 deletions(-)

diff --git a/core/src/main/java/com/cloud/resource/ServerResourceBase.java b/core/src/main/java/com/cloud/resource/ServerResourceBase.java
index 438de8d4f16a..22cafc57d2ce 100644
--- a/core/src/main/java/com/cloud/resource/ServerResourceBase.java
+++ b/core/src/main/java/com/cloud/resource/ServerResourceBase.java
@@ -28,6 +28,7 @@
 import java.net.SocketException;
 import java.text.ParseException;
 import java.text.SimpleDateFormat;
+import java.util.AbstractMap;
 import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.Collections;
@@ -39,12 +40,14 @@
 import java.util.List;
 import java.util.Locale;
 import java.util.Map;
+import java.util.Optional;
 import java.util.regex.Matcher;
 import java.util.regex.Pattern;
 
 import javax.naming.ConfigurationException;
 import java.util.Set;
 import java.util.stream.Collectors;
+import java.util.stream.Stream;
 import java.nio.file.Files;
 import java.nio.file.Path;
 
@@ -249,8 +252,7 @@ public Answer listHostLunDevices(Command command) {
             OutputInterpreter.AllLinesParser parser = new OutputInterpreter.AllLinesParser();
             String result = cmd.execute(parser);
 
-            if (result != null) {
-                logger.error("Failed to execute lsblk command: " + result);
+            if (result != null || parser.getLines() == null || parser.getLines().trim().isEmpty()) {
                 return new ListHostLunDeviceAnswer(false, hostDevicesNames, hostDevicesText, hasPartitions, scsiAddresses);
             }
 
@@ -285,28 +287,21 @@ private ListHostLunDeviceAnswer listHostLunDevicesFast() {
             List<String> scsiAddresses = new ArrayList<>();
 
             Map<String, String> scsiAddressCache = getScsiAddressesFromSysfs();
-            Map<java.nio.file.Path, String> realToById = buildByIdReverseMap();
+            Map<Path, String> realToById = buildByIdReverseMap();
 
-            java.io.File sysBlock = new java.io.File("/sys/block");
-            java.io.File[] entries = sysBlock.listFiles();
+            File sysBlock = new File("/sys/block");
+            File[] entries = sysBlock.listFiles();
             if (entries == null) {
-                logger.debug("No entries found in /sys/block");
                 return null;
             }
 
-            logger.debug("Found " + entries.length + " entries in /sys/block");
-
             // 통합된 디바이스 수집으로 변경
             collectAllLunDevicesUnified(names, texts, hasPartitions, scsiAddresses, scsiAddressCache, realToById);
-
-            logger.debug("Final LUN device count: " + names.size());
             for (int i = 0; i < names.size(); i++) {
-                logger.debug("LUN device " + i + ": " + names.get(i));
             }
 
             return new ListHostLunDeviceAnswer(true, names, texts, hasPartitions, scsiAddresses);
         } catch (Exception e) {
-            logger.debug("Fast sysfs scan failed, falling back: " + e.getMessage());
             return null;
         }
     }
@@ -316,16 +311,16 @@ private ListHostLunDeviceAnswer listHostLunDevicesFast() {
      */
     private void collectAllLunDevicesUnified(List<String> names, List<String> texts, List<Boolean> hasPartitions,
                                            List<String> scsiAddresses, Map<String, String> scsiAddressCache,
-                                           Map<java.nio.file.Path, String> realToById) {
-        java.io.File sysBlock = new java.io.File("/sys/block");
-        java.io.File[] entries = sysBlock.listFiles();
+                                           Map<Path, String> realToById) {
+        File sysBlock = new File("/sys/block");
+        File[] entries = sysBlock.listFiles();
         if (entries == null) return;
 
         // 중복 제거를 위한 Set
         Set<String> addedDevices = new HashSet<>();
 
         // 1. 직접 디바이스 수집
-        for (java.io.File entry : entries) {
+        for (File entry : entries) {
             String bname = entry.getName();
             if (!(bname.startsWith("sd") || bname.startsWith("vd") || bname.startsWith("xvd") ||
                   bname.startsWith("nvme") || bname.startsWith("dm-"))) {
@@ -352,7 +347,7 @@ private void collectAllLunDevicesUnified(List<String> names, List<String> texts,
     /**
      * 디바이스를 리스트에 추가하는 공통 메서드
      */
-    private void addDeviceToList(String devPath, String preferred, java.io.File entry,
+    private void addDeviceToList(String devPath, String preferred, File entry,
                                List<String> names, List<String> texts, List<Boolean> hasPartitionsList,
                                List<String> scsiAddresses, Map<String, String> scsiAddressCache, String bname) {
         StringBuilder info = new StringBuilder();
@@ -381,14 +376,12 @@ private void addDeviceToList(String devPath, String preferred, java.io.File entr
             String byIdName = preferred.substring(preferred.lastIndexOf('/') + 1);
             String displayName = devPath + " (" + byIdName + ")";
 
-            logger.debug("Adding LUN device: " + displayName + " (path: " + preferred + ", hasPartitions: " + deviceHasPartitions + ")");
             names.add(displayName);
             texts.add(info.toString());
             hasPartitionsList.add(deviceHasPartitions);
             scsiAddresses.add(scsiAddr != null ? scsiAddr : "");
         } else {
             // ID 값이 없는 경우 리스트에 추가하지 않음
-            logger.debug("Skipping LUN device (no ID): " + devPath + " (preferred: " + preferred + ")");
         }
     }
 
@@ -425,7 +418,7 @@ private void collectMultipathDevicesUnified(List<String> names, List<String> tex
                 }
             }
         } catch (Exception e) {
-            logger.debug("Error collecting multipath devices: " + e.getMessage());
+            // Error collecting multipath devices
         }
     }
 
@@ -460,14 +453,12 @@ private void addMultipathDeviceToList(String devicePath, String preferredName,
             String byIdName = preferredName.substring(preferredName.lastIndexOf('/') + 1);
             String displayName = devicePath + " (" + byIdName + ")";
 
-            logger.debug("Adding multipath LUN device: " + displayName + " (path: " + preferredName + ", hasPartitions: " + hasPartition + ")");
             names.add(displayName);
             texts.add(deviceInfo.toString());
             hasPartitionsList.add(hasPartition);
             scsiAddresses.add(scsiAddress != null ? scsiAddress : "");
         } else {
             // ID 값이 없는 경우 리스트에 추가하지 않음
-            logger.debug("Skipping multipath LUN device (no ID): " + devicePath + " (preferred: " + preferredName + ")");
         }
     }
 
@@ -482,22 +473,22 @@ private String extractDmDeviceFromLine(String line) {
             }
         }
 
-        java.util.regex.Pattern pattern = java.util.regex.Pattern.compile("dm-\\d+");
-        java.util.regex.Matcher matcher = pattern.matcher(line);
+        Pattern pattern = Pattern.compile("dm-\\d+");
+        Matcher matcher = pattern.matcher(line);
         if (matcher.find()) {
             return matcher.group();
         }
 
         return null;
     }
-    private Map<java.nio.file.Path, String> buildByIdReverseMap() {
-        Map<java.nio.file.Path, String> map = new java.util.HashMap<>();
-        java.nio.file.Path byIdDir = java.nio.file.Paths.get("/dev/disk/by-id");
+    private Map<Path, String> buildByIdReverseMap() {
+        Map<Path, String> map = new HashMap<>();
+        Path byIdDir = Path.of("/dev/disk/by-id");
         try {
-            if (!java.nio.file.Files.isDirectory(byIdDir)) return map;
-            try (java.util.stream.Stream<java.nio.file.Path> s = java.nio.file.Files.list(byIdDir)) {
-                s.filter(java.nio.file.Files::isSymbolicLink).forEach(p -> {
-                    java.nio.file.Path rp = safeRealPath(p);
+            if (!Files.isDirectory(byIdDir)) return map;
+            try (Stream<Path> s = Files.list(byIdDir)) {
+                s.filter(Files::isSymbolicLink).forEach(p -> {
+                    Path rp = safeRealPath(p);
                     if (rp != null) {
                         String byIdPath = byIdDir.resolve(p.getFileName()).toString();
                         map.put(rp, byIdPath);
@@ -510,9 +501,9 @@ private Map<java.nio.file.Path, String> buildByIdReverseMap() {
         return map;
     }
 
-    private String resolveById(Map<java.nio.file.Path, String> realToById, String devicePath) {
+    private String resolveById(Map<Path, String> realToById, String devicePath) {
         try {
-            java.nio.file.Path real = java.nio.file.Paths.get(devicePath).toRealPath();
+            Path real = Path.of(devicePath).toRealPath();
             String byId = realToById.get(real);
             if (byId != null) {
                 // LUN 디바이스는 전체 디스크를 사용해야 하므로 파티션 부분 제거
@@ -530,25 +521,22 @@ private String resolveById(Map<java.nio.file.Path, String> realToById, String de
         }
     }
 
-    private boolean sysHasPartitions(java.io.File sysBlockEntry) {
+    private boolean sysHasPartitions(File sysBlockEntry) {
         try {
             String name = sysBlockEntry.getName();
-            java.io.File[] children = sysBlockEntry.listFiles();
+            File[] children = sysBlockEntry.listFiles();
             if (children == null) return false;
 
-            logger.debug("Checking partitions for device: " + name);
-            for (java.io.File child : children) {
+            for (File child : children) {
                 String childName = child.getName();
-                logger.debug("Checking child: " + childName);
 
                 // 파티션 디렉토리인지 확인 (예: sda1, sda2 등)
                 if (childName.startsWith(name) && childName.length() > name.length()) {
                     String suffix = childName.substring(name.length());
                     // 숫자로만 구성된 경우 파티션으로 간주
                     if (suffix.matches("\\d+")) {
-                        java.io.File partFile = new java.io.File(child, "partition");
+                        File partFile = new File(child, "partition");
                         if (partFile.exists()) {
-                            logger.debug("Found partition: " + childName);
                             return true;
                         }
                     }
@@ -557,12 +545,17 @@ private boolean sysHasPartitions(java.io.File sysBlockEntry) {
 
             // 추가로 lsblk 명령어로도 확인 (예외 처리 강화)
             try {
+                // 디바이스가 존재하는지 먼저 확인
+                File deviceFile = new File("/dev/" + name);
+                if (!deviceFile.exists()) {
+                    return false;
+                }
                 Script lsblkCmd = new Script("/usr/bin/lsblk");
                 lsblkCmd.add("--json", "--paths", "--output", "NAME,TYPE", "/dev/" + name);
                 OutputInterpreter.AllLinesParser parser = new OutputInterpreter.AllLinesParser();
                 String result = lsblkCmd.execute(parser);
 
-                if (result == null && parser.getLines() != null) {
+                if (result == null && parser.getLines() != null && !parser.getLines().trim().isEmpty()) {
                     try {
                         JSONObject json = new JSONObject(parser.getLines());
                         JSONArray blockdevices = json.getJSONArray("blockdevices");
@@ -574,56 +567,53 @@ private boolean sysHasPartitions(java.io.File sysBlockEntry) {
                                     JSONObject child = jsonChildren.getJSONObject(i);
                                     String childType = child.optString("type", "");
                                     if ("part".equals(childType)) {
-                                        logger.debug("Found partition via lsblk: " + child.optString("name", ""));
                                         return true;
                                     }
                                 }
                             }
                         }
                     } catch (Exception e) {
-                        logger.debug("Error parsing lsblk output: " + e.getMessage());
+                        // Error parsing lsblk output
                     }
                 }
             } catch (Exception e) {
-                logger.debug("Error executing lsblk command for device {}: {}", name, e.getMessage());
                 // lsblk 실패 시 sysfs 기반 결과만 사용
             }
 
-            logger.debug("No partitions found for device: " + name);
             return false;
         } catch (Exception e) {
-            logger.debug("Error checking partitions for " + sysBlockEntry.getName() + ": " + e.getMessage());
+            // Error checking partitions
             return false;
         }
     }
 
-    private String sysGetSizeHuman(java.io.File sysBlockEntry) {
+    private String sysGetSizeHuman(File sysBlockEntry) {
         try {
-            java.io.File sizeFile = new java.io.File(sysBlockEntry, "size");
+            File sizeFile = new File(sysBlockEntry, "size");
             if (!sizeFile.exists()) return null;
-            String content = new String(java.nio.file.Files.readAllBytes(sizeFile.toPath())).trim();
+            String content = new String(Files.readAllBytes(sizeFile.toPath())).trim();
             if (content.isEmpty()) return null;
             long sectors = Long.parseLong(content);
             double gib = (sectors * 512.0) / 1024 / 1024 / 1024;
-            return String.format(java.util.Locale.ROOT, "%.2fG", gib);
+            return String.format(Locale.ROOT, "%.2fG", gib);
         } catch (Exception ignore) {
             return null;
         }
     }
 
     private Map<String, String> getScsiAddressesFromSysfs() {
-        Map<String, String> map = new java.util.HashMap<>();
+        Map<String, String> map = new HashMap<>();
         try {
-            java.io.File sysBlock = new java.io.File("/sys/block");
-            java.io.File[] entries = sysBlock.listFiles();
+            File sysBlock = new File("/sys/block");
+            File[] entries = sysBlock.listFiles();
             if (entries == null) return map;
-            for (java.io.File e : entries) {
+            for (File e : entries) {
                 String name = e.getName();
                 if (!(name.startsWith("sd") || name.startsWith("vd") || name.startsWith("xvd"))) continue;
-                java.nio.file.Path devLink = java.nio.file.Paths.get(e.getAbsolutePath(), "device");
+                Path devLink = Path.of(e.getAbsolutePath(), "device");
                 try {
-                    java.nio.file.Path real = java.nio.file.Files.readSymbolicLink(devLink);
-                    java.nio.file.Path resolved = devLink.getParent().resolve(real).normalize();
+                    Path real = Files.readSymbolicLink(devLink);
+                    Path resolved = devLink.getParent().resolve(real).normalize();
                     String scsi = resolved.getFileName().toString();
                     map.put("/dev/" + name, scsi);
                 } catch (Exception ignore) {}
@@ -654,7 +644,6 @@ private void addLunDeviceRecursiveOptimized(JSONObject device, List<String> name
                 String byIdName = preferredName.substring(preferredName.lastIndexOf('/') + 1);
                 String displayName = name + " (" + byIdName + ")";
 
-                logger.debug("Adding LUN device: " + displayName + " (path: " + preferredName + ", hasPartitions: " + hasPartition + ")");
                 names.add(displayName);
                 StringBuilder deviceInfo = new StringBuilder();
                 deviceInfo.append("TYPE: ").append(type);
@@ -674,7 +663,6 @@ private void addLunDeviceRecursiveOptimized(JSONObject device, List<String> name
                 scsiAddresses.add(scsiAddress != null ? scsiAddress : "");
             } else {
                 // ID 값이 없는 경우 리스트에 추가하지 않음
-                logger.debug("Skipping LUN device (no ID): " + name + " (preferred: " + preferredName + ")");
             }
         }
 
@@ -697,17 +685,17 @@ private String resolveDevicePathToById(String devicePath) {
                 return devicePath;
             }
 
-            java.nio.file.Path device = java.nio.file.Paths.get(devicePath).toRealPath();
-            java.nio.file.Path byIdDir = java.nio.file.Paths.get("/dev/disk/by-id");
+            Path device = Path.of(devicePath).toRealPath();
+            Path byIdDir = Path.of("/dev/disk/by-id");
 
-            if (!java.nio.file.Files.isDirectory(byIdDir)) {
+            if (!Files.isDirectory(byIdDir)) {
                 return devicePath;
             }
 
-            try (java.util.stream.Stream<java.nio.file.Path> stream = java.nio.file.Files.list(byIdDir)) {
-                java.util.Optional<String> firstMatch = stream
-                    .filter(java.nio.file.Files::isSymbolicLink)
-                    .map(p -> new java.util.AbstractMap.SimpleEntry<>(p, safeRealPath(p)))
+            try (Stream<Path> stream = Files.list(byIdDir)) {
+                Optional<String> firstMatch = stream
+                    .filter(Files::isSymbolicLink)
+                    .map(p -> new AbstractMap.SimpleEntry<>(p, safeRealPath(p)))
                     .filter(e -> e.getValue() != null && e.getValue().equals(device))
                     .map(e -> byIdDir.resolve(e.getKey().getFileName()).toString())
                     .findFirst();
@@ -727,11 +715,11 @@ private String resolveDevicePathToById(String devicePath) {
         }
     }
 
-    private java.nio.file.Path safeRealPath(java.nio.file.Path link) {
+    private Path safeRealPath(Path link) {
         try {
-            java.nio.file.Path target = java.nio.file.Files.readSymbolicLink(link);
+            Path target = Files.readSymbolicLink(link);
             // 상대 링크일 수 있음
-            java.nio.file.Path resolved = link.getParent().resolve(target).normalize();
+            Path resolved = link.getParent().resolve(target).normalize();
             return resolved.toRealPath();
         } catch (Exception e) {
             return null;
@@ -824,7 +812,7 @@ private Set<String> getDmDevices() {
                     }
                 }
             } else {
-                logger.warn("Failed to execute multipath -l command: " + result);
+                // Failed to execute multipath -l command
             }
 
         } catch (Exception e) {
@@ -925,7 +913,7 @@ private String getSymbolicLinkTarget(File file) {
             Path target = Files.readSymbolicLink(file.toPath());
             return target.toString();
         } catch (Exception e) {
-            logger.debug("Error reading symbolic link " + file.getPath() + ": " + e.getMessage());
+            // Error reading symbolic link
             return null;
         }
     }
@@ -1029,7 +1017,7 @@ private String resolveDmUuidToDevice(String dmUuid) {
                 }
             }
         } catch (Exception e) {
-            logger.debug("Failed to resolve dm-uuid {}: {}", dmUuid, e.getMessage());
+            // Failed to resolve dm-uuid
         }
         return null;
     }
@@ -1050,7 +1038,7 @@ private String resolveByIdToDevice(String byIdPath) {
                 return parser.getLines().trim();
             }
         } catch (Exception e) {
-            logger.debug("Failed to resolve by-id path {}: {}", byIdPath, e.getMessage());
+            // Failed to resolve by-id path
         }
         return null;
     }
@@ -1074,7 +1062,6 @@ private String findSafeTargetDevForVm(String devicePath) {
             }
 
             // 모든 후보가 사용 중이면 sdd 반환 (fallback)
-            logger.warn("All target dev candidates are in use, using sdd as fallback for device: {}", devicePath);
             return "sdd";
 
         } catch (Exception e) {
@@ -1120,13 +1107,12 @@ private Set<String> getCurrentlyUsedTargetDevs() {
                                 }
                             }
                         } catch (Exception e) {
-                            logger.debug("Error checking target devs for VM {}: {}", vmName, e.getMessage());
+                            // Error checking target devs for VM
                         }
                     }
                 }
             }
 
-            logger.debug("Currently used target devs: {}", usedDevs);
             return usedDevs;
 
         } catch (Exception e) {
@@ -1201,7 +1187,7 @@ private String extractScsiAddressFromDevice(String devicePath) {
                 }
             }
         } catch (Exception e) {
-            logger.debug("Failed to extract SCSI address from device {}: {}", devicePath, e.getMessage());
+            // Failed to extract SCSI address from device
         }
 
         return null;
@@ -1308,6 +1294,12 @@ private String getTargetDeviceName(String devicePath) {
      */
     private boolean hasPartitionRecursiveForDevice(String devicePath) {
         try {
+            // 디바이스가 존재하는지 먼저 확인
+            File deviceFile = new File(devicePath);
+            if (!deviceFile.exists()) {
+                return false;
+            }
+
             Script cmd = new Script("/usr/bin/lsblk");
             cmd.add("--json", "--paths", "--output", "NAME,TYPE", devicePath);
             OutputInterpreter.AllLinesParser parser = new OutputInterpreter.AllLinesParser();
@@ -1315,11 +1307,11 @@ private boolean hasPartitionRecursiveForDevice(String devicePath) {
             try {
                 result = cmd.execute(parser);
             } catch (Exception e) {
-                logger.debug("Error executing lsblk command for device {}: {}", devicePath, e.getMessage());
+                // Error executing lsblk command for device
                 return false;
             }
 
-            if (result == null && parser.getLines() != null) {
+            if (result == null && parser.getLines() != null && !parser.getLines().trim().isEmpty()) {
                 try {
                     JSONObject json = new JSONObject(parser.getLines());
                     JSONArray blockdevices = json.getJSONArray("blockdevices");
@@ -1329,12 +1321,12 @@ private boolean hasPartitionRecursiveForDevice(String devicePath) {
                         return hasPartitionRecursive(device);
                     }
                 } catch (Exception e) {
-                    logger.debug("Error parsing lsblk JSON output for device {}: {}", devicePath, e.getMessage());
+                    // Error parsing lsblk JSON output for device
                 }
             }
 
         } catch (Exception e) {
-            logger.debug("Error executing lsblk command for device {}: {}", devicePath, e.getMessage());
+            // Error executing lsblk command for device
         }
 
         return false;
@@ -1345,12 +1337,18 @@ private boolean hasPartitionRecursiveForDevice(String devicePath) {
      */
     private String getDeviceSize(String devicePath) {
         try {
+            // 디바이스가 존재하는지 먼저 확인
+            File deviceFile = new File(devicePath);
+            if (!deviceFile.exists()) {
+                return null;
+            }
+
             Script cmd = new Script("/usr/bin/lsblk");
             cmd.add("--json", "--paths", "--output", "NAME,SIZE", devicePath);
             OutputInterpreter.AllLinesParser parser = new OutputInterpreter.AllLinesParser();
             String result = cmd.execute(parser);
 
-            if (result == null) {
+            if (result == null && parser.getLines() != null && !parser.getLines().trim().isEmpty()) {
                 JSONObject json = new JSONObject(parser.getLines());
                 JSONArray blockdevices = json.getJSONArray("blockdevices");
 
@@ -1361,7 +1359,7 @@ private String getDeviceSize(String devicePath) {
             }
 
         } catch (Exception e) {
-            logger.debug("Error getting size for device " + devicePath + ": " + e.getMessage());
+            // Error getting size for device
         }
 
         return null;
@@ -1377,16 +1375,13 @@ private boolean hasPartitionRecursive(JSONObject device) {
 
         if ("lvm".equals(deviceType) || deviceName.startsWith("/dev/mapper/")) {
             if (deviceName.contains("ceph--") && deviceName.contains("--osd--block--")) {
-                logger.debug("Ceph OSD device, no partitions: " + deviceName);
                 return false;
             }
-            logger.debug("LVM device, has partitions: " + deviceName);
             return true;
         }
 
         if (device.has("children")) {
             JSONArray children = device.getJSONArray("children");
-            logger.debug("Device has " + children.length() + " children: " + deviceName);
 
             for (int i = 0; i < children.length(); i++) {
                 JSONObject child = children.getJSONObject(i);
@@ -1400,7 +1395,6 @@ private boolean hasPartitionRecursive(JSONObject device) {
 
                 // LVM 볼륨이 있으면 true
                 if ("lvm".equals(childType)) {
-                    logger.debug("Found LVM child: " + childName);
                     return true;
                 }
 
@@ -1409,7 +1403,7 @@ private boolean hasPartitionRecursive(JSONObject device) {
                 }
             }
         } else {
-            logger.debug("Device has no children: " + deviceName);
+            // Device has no children
         }
         return false;
     }
@@ -1444,7 +1438,7 @@ private Map<String, String> getScsiAddressesBatch() {
                     }
                 }
             } catch (Exception e) {
-                logger.debug("Error executing lsscsi command in batch: {}", e.getMessage());
+                // Error executing lsscsi command in batch
             }
 
             // sysfs에서 추가 정보 수집 (lsscsi에서 찾지 못한 디바이스들)
@@ -1472,12 +1466,12 @@ private Map<String, String> getScsiAddressesBatch() {
                         }
                     }
                 }
-            } catch (Exception e) {
-                logger.debug("Error reading sysfs SCSI addresses: " + e.getMessage());
-            }
+                } catch (Exception e) {
+                    // Error reading sysfs SCSI addresses
+                }
 
         } catch (Exception e) {
-            logger.debug("Error getting SCSI addresses batch: " + e.getMessage());
+            // Error getting SCSI addresses batch
         }
 
         return scsiAddressMap;
@@ -1495,7 +1489,7 @@ private Set<String> getDevicesInUseBatch() {
             OutputInterpreter.AllLinesParser parser = new OutputInterpreter.AllLinesParser();
             String result = listCommand.execute(parser);
 
-            if (result == null && parser.getLines() != null) {
+            if (result == null && parser.getLines() != null && !parser.getLines().trim().isEmpty()) {
                 String[] vmIds = parser.getLines().split("\\n");
                 for (String vmId : vmIds) {
                     vmId = vmId.trim();
@@ -1520,7 +1514,7 @@ private Set<String> getDevicesInUseBatch() {
                                 }
                             }
                         } catch (Exception e) {
-                            logger.debug("Error processing VM " + vmId + ": " + e.getMessage());
+                            // Error processing VM
                         }
                     }
                 }
@@ -1544,11 +1538,11 @@ private Set<String> getDevicesInUseBatch() {
                     }
                 }
             } catch (Exception e) {
-                logger.debug("Error getting mounted devices: " + e.getMessage());
+                // Error getting mounted devices
             }
 
         } catch (Exception e) {
-            logger.debug("Error getting devices in use batch: " + e.getMessage());
+            // Error getting devices in use batch
         }
 
         return devicesInUse;
@@ -1564,11 +1558,10 @@ private Set<String> getDevicesInUseBatch(long timeoutMs) {
             } catch (java.util.concurrent.TimeoutException te) {
                 timedOut.set(true);
                 fut.cancel(true);
-                logger.warn("getDevicesInUseBatch timed out after " + timeoutMs + "ms; returning partial/empty set");
                 return new HashSet<>();
             }
         } catch (Exception e) {
-            logger.debug("getDevicesInUseBatch with timeout failed: " + e.getMessage());
+            // getDevicesInUseBatch with timeout failed
             return new HashSet<>();
         } finally {
             es.shutdownNow();
@@ -1580,7 +1573,6 @@ private String getScsiAddress(String deviceName) {
         try {
             // Ceph OSD 디바이스인지 확인
             if (deviceName.contains("ceph--") && deviceName.contains("--osd--block--")) {
-                logger.debug("Ceph OSD device detected: {}", deviceName);
                 return generateVirtualScsiAddressForCeph(deviceName);
             }
 
@@ -1597,7 +1589,7 @@ private String getScsiAddress(String deviceName) {
                     return scsiAddress;
                 }
             } catch (Exception e) {
-                logger.debug("Error reading SCSI device file {}: {}", scsiDevicePath, e.getMessage());
+                // Error reading SCSI device file
             }
 
             try {
@@ -1620,7 +1612,7 @@ private String getScsiAddress(String deviceName) {
                     }
                 }
             } catch (Exception e) {
-                logger.debug("Error executing lsscsi command for device {}: {}", deviceName, e.getMessage());
+                // Error executing lsscsi command for device
             }
 
             return null;
@@ -1716,7 +1708,7 @@ private String findVhbaDeviceByWwnn(String wwnn) {
             OutputInterpreter.AllLinesParser parser = new OutputInterpreter.AllLinesParser();
             String result = cmd.execute(parser);
 
-            if (result == null && parser.getLines() != null) {
+            if (result == null && parser.getLines() != null && !parser.getLines().trim().isEmpty()) {
                 String[] devices = parser.getLines().split("\\n");
                 for (String device : devices) {
                     device = device.trim();
@@ -1805,7 +1797,7 @@ private boolean isLunDeviceAllocatedToVm(String deviceName) {
             OutputInterpreter.AllLinesParser parser = new OutputInterpreter.AllLinesParser();
             String result = listCommand.execute(parser);
 
-            if (result == null && parser.getLines() != null) {
+            if (result == null && parser.getLines() != null && !parser.getLines().trim().isEmpty()) {
                 boolean isAllocated = parser.getLines().trim().equals("allocated");
                 if (isAllocated) {
                 }
@@ -1829,7 +1821,7 @@ public Answer listHostScsiDevices(Command command) {
             if (fast != null && fast.getResult()) {
                 return fast;
             }
-            Map<java.nio.file.Path, String> realToById = buildByIdReverseMap();
+            Map<Path, String> realToById = buildByIdReverseMap();
 
             Script cmd = new Script("/usr/bin/lsscsi");
             cmd.add("-g");
@@ -1883,10 +1875,10 @@ private com.cloud.agent.api.ListHostScsiDeviceAnswer listHostScsiDevicesFast() {
 
             // LUN과 동일한 최적화: 배치로 정보 수집
             Map<String, String> scsiAddressCache = getScsiAddressesBatch();
-            Map<java.nio.file.Path, String> realToById = buildByIdReverseMap();
+            Map<Path, String> realToById = buildByIdReverseMap();
 
-            java.io.File sysBlock = new java.io.File("/sys/block");
-            java.io.File[] entries = sysBlock.listFiles();
+            File sysBlock = new File("/sys/block");
+            File[] entries = sysBlock.listFiles();
             if (entries == null) {
                 return null;
             }
@@ -1894,12 +1886,12 @@ private com.cloud.agent.api.ListHostScsiDeviceAnswer listHostScsiDevicesFast() {
             // 통합된 디바이스 수집 (LUN과 동일한 패턴)
             collectAllScsiDevicesUnified(names, texts, hasPartitions, scsiAddressCache, realToById);
             for (int i = 0; i < names.size(); i++) {
-                logger.debug("SCSI device " + i + ": " + names.get(i));
+                // SCSI device
             }
 
             return new com.cloud.agent.api.ListHostScsiDeviceAnswer(true, names, texts, hasPartitions);
         } catch (Exception ex) {
-            logger.debug("Fast SCSI sysfs scan failed: " + ex.getMessage());
+            // Fast SCSI sysfs scan failed
             return null;
         }
     }
@@ -1908,13 +1900,13 @@ private com.cloud.agent.api.ListHostScsiDeviceAnswer listHostScsiDevicesFast() {
      * 모든 SCSI 디바이스를 통합적으로 수집하는 메서드 (LUN과 동일한 최적화)
      */
     private void collectAllScsiDevicesUnified(List<String> names, List<String> texts, List<Boolean> hasPartitions,
-                                            Map<String, String> scsiAddressCache, Map<java.nio.file.Path, String> realToById) {
+                                            Map<String, String> scsiAddressCache, Map<Path, String> realToById) {
         try {
-            java.io.File sysBlock = new java.io.File("/sys/block");
-            java.io.File[] entries = sysBlock.listFiles();
+            File sysBlock = new File("/sys/block");
+            File[] entries = sysBlock.listFiles();
             if (entries == null) return;
 
-            for (java.io.File e : entries) {
+            for (File e : entries) {
                 String bname = e.getName();
                 if (!(bname.startsWith("sd") || bname.startsWith("vd") || bname.startsWith("xvd"))) {
                     continue;
@@ -1925,8 +1917,8 @@ private void collectAllScsiDevicesUnified(List<String> names, List<String> texts
                 // sg 매핑
                 String sg = null;
                 try {
-                    java.io.File sgDir = new java.io.File(e, "device/scsi_generic");
-                    java.io.File[] sgs = sgDir.listFiles();
+                    File sgDir = new File(e, "device/scsi_generic");
+                    File[] sgs = sgDir.listFiles();
                     if (sgs != null && sgs.length > 0) {
                         sg = "/dev/" + sgs[0].getName();
                     }
@@ -1936,17 +1928,17 @@ private void collectAllScsiDevicesUnified(List<String> names, List<String> texts
                 String scsiAddress = scsiAddressCache.get(dev);
                 if (scsiAddress == null) {
                     try {
-                        java.nio.file.Path devLink = java.nio.file.Paths.get(e.getAbsolutePath(), "device");
-                        java.nio.file.Path real = java.nio.file.Files.readSymbolicLink(devLink);
-                        java.nio.file.Path resolved = devLink.getParent().resolve(real).normalize();
+                        Path devLink = Path.of(e.getAbsolutePath(), "device");
+                        Path real = Files.readSymbolicLink(devLink);
+                        Path resolved = devLink.getParent().resolve(real).normalize();
                         scsiAddress = resolved.getFileName().toString();
                     } catch (Exception ignore) {}
                 }
 
                 // 벤더/모델/리비전 (배치 읽기)
-                String vendor = readFirstLineQuiet(new java.io.File(e, "device/vendor"));
-                String model = readFirstLineQuiet(new java.io.File(e, "device/model"));
-                String rev = readFirstLineQuiet(new java.io.File(e, "device/rev"));
+                String vendor = readFirstLineQuiet(new File(e, "device/vendor"));
+                String model = readFirstLineQuiet(new File(e, "device/model"));
+                String rev = readFirstLineQuiet(new File(e, "device/rev"));
 
                 String byId = resolveById(realToById, dev);
 
@@ -1971,14 +1963,14 @@ private void collectAllScsiDevicesUnified(List<String> names, List<String> texts
                 hasPartitions.add(false);
             }
         } catch (Exception e) {
-            logger.debug("Error collecting SCSI devices unified: " + e.getMessage());
+            // Error collecting SCSI devices unified
         }
     }
 
-    private String readFirstLineQuiet(java.io.File f) {
+    private String readFirstLineQuiet(File f) {
         try {
             if (!f.exists()) return null;
-            String s = new String(java.nio.file.Files.readAllBytes(f.toPath())).trim();
+            String s = new String(Files.readAllBytes(f.toPath())).trim();
             return s.isEmpty() ? null : s;
         } catch (Exception ignore) {
             return null;
@@ -2028,13 +2020,12 @@ protected Answer listHostHbaDevices(Command command) {
                         // 해당 scsi_host에 대한 SCSI 주소 정보 저장
                         if (!scsiAddressMap.containsKey(scsiHostName)) {
                             scsiAddressMap.put(scsiHostName, scsiAddress);
-                            logger.debug("Mapped " + scsiHostName + " to SCSI address: " + scsiAddress);
                         }
                     }
                 }
             }
         } catch (Exception e) {
-            logger.debug("SCSI 디바이스 조회 중 오류 발생: " + e.getMessage());
+            // SCSI 디바이스 조회 중 오류 발생
         }
 
         // 2. virsh nodedev-list --cap vports로 vHBA 지원 물리 HBA 조회 (화면에 표시)
@@ -2065,17 +2056,17 @@ protected Answer listHostHbaDevices(Command command) {
                 }
             }
         } catch (Exception e) {
-            logger.debug("vHBA 지원 HBA 조회 중 오류 발생: " + e.getMessage());
+            // vHBA 지원 HBA 조회 중 오류 발생
         }
 
         // 3. virsh nodedev-list | grep vhba로 vHBA 추가
         try {
             Script vhbaCommand = new Script("/bin/bash");
             vhbaCommand.add("-c");
-            vhbaCommand.add("virsh nodedev-list | grep vhba");
+            vhbaCommand.add("virsh nodedev-list | grep vhba || true");
             OutputInterpreter.AllLinesParser vhbaParser = new OutputInterpreter.AllLinesParser();
             String vhbaResult = vhbaCommand.execute(vhbaParser);
-            if (vhbaResult == null && vhbaParser.getLines() != null) {
+            if (vhbaResult == null && vhbaParser.getLines() != null && !vhbaParser.getLines().trim().isEmpty()) {
                 String[] vhbaLines = vhbaParser.getLines().split("\\n");
                 for (String vhbaLine : vhbaLines) {
                     String vhbaName = vhbaLine.trim();
@@ -2132,7 +2123,7 @@ protected Answer listHostHbaDevices(Command command) {
                 }
             }
         } catch (Exception e) {
-            logger.debug("vHBA 조회 중 오류 발생: " + e.getMessage());
+            // vHBA 조회 중 오류 발생
         }
         return new ListHostHbaDeviceAnswer(true, hostDevicesNames, hostDevicesText, deviceTypes, parentHbaNames);
     }
@@ -2274,7 +2265,7 @@ public Answer createHostVHbaDevice(CreateVhbaDeviceCommand command, String paren
                     try (FileWriter writer = new FileWriter(backupFilePath)) {
                         writer.write(actualVhbaXml);
                     } catch (IOException e) {
-                        logger.warn("vHBA 백업 파일 생성 실패: " + e.getMessage());
+                        // vHBA 백업 파일 생성 실패
                     }
                 } else {
                 }
@@ -2344,7 +2335,7 @@ public Answer deleteHostVHbaDevice(DeleteVhbaDeviceCommand command) {
             if (backupFile.exists()) {
                 if (backupFile.delete()) {
                 } else {
-                    logger.warn("vHBA 백업 파일 삭제 실패: " + backupFilePath);
+                    // vHBA 백업 파일 삭제 실패
                 }
             } else {
             }
@@ -2375,12 +2366,12 @@ private boolean isVhbaAllocatedToVm(String vhbaName) {
             OutputInterpreter.AllLinesParser parser = new OutputInterpreter.AllLinesParser();
             String result = checkCommand.execute(parser);
 
-            if (result == null && parser.getLines() != null) {
+            if (result == null && parser.getLines() != null && !parser.getLines().trim().isEmpty()) {
                 return parser.getLines().trim().equals("allocated");
             }
             return false;
         } catch (Exception e) {
-            logger.debug("vHBA 할당 상태 확인 중 오류: " + e.getMessage());
+            // vHBA 할당 상태 확인 중 오류
             return false;
         }
     }
@@ -2394,7 +2385,7 @@ private boolean validateParentHbaFromVports(String parentHbaName) {
             OutputInterpreter.AllLinesParser parser = new OutputInterpreter.AllLinesParser();
             String result = vportsCommand.execute(parser);
 
-            if (result == null && parser.getLines() != null) {
+            if (result == null && parser.getLines() != null && !parser.getLines().trim().isEmpty()) {
                 String[] lines = parser.getLines().split("\\n");
                 for (String line : lines) {
                     String hbaName = line.trim();
@@ -2404,10 +2395,8 @@ private boolean validateParentHbaFromVports(String parentHbaName) {
                 }
             }
 
-            logger.warn("부모 HBA가 vports 지원 목록에 없음: " + parentHbaName);
             return false;
         } catch (Exception e) {
-            logger.debug("부모 HBA vports 검증 중 오류: " + e.getMessage());
             return false;
         }
     }
@@ -2430,7 +2419,6 @@ private String extractCreatedDeviceNameFromOutput(String output) {
             }
         }
 
-        logger.warn("생성된 디바이스명을 찾을 수 없음. 출력: " + output);
         return null;
     }
 
@@ -2443,13 +2431,13 @@ private boolean validateCreatedVhba(String deviceName) {
             OutputInterpreter.AllLinesParser parser = new OutputInterpreter.AllLinesParser();
             String result = validateCommand.execute(parser);
 
-            if (result == null && parser.getLines() != null) {
+            if (result == null && parser.getLines() != null && !parser.getLines().trim().isEmpty()) {
                 String count = parser.getLines().trim();
                 return !count.equals("0");
             }
             return false;
         } catch (Exception e) {
-            logger.debug("생성된 vHBA 검증 중 오류: " + e.getMessage());
+            // 생성된 vHBA 검증 중 오류
             return false;
         }
     }
@@ -2499,17 +2487,17 @@ protected Answer listHostVHbaDevices(Command command) {
                         }
                     }
                 } catch (Exception e) {
-                    logger.debug("특정 물리 HBA vHBA 조회 중 오류: " + e.getMessage());
+                    // 특정 물리 HBA vHBA 조회 중 오류
                 }
             } else {
                 try {
                     Script scsiHostCommand = new Script("/bin/bash");
                     scsiHostCommand.add("-c");
-                    scsiHostCommand.add("virsh nodedev-list | grep scsi_host");
+                    scsiHostCommand.add("virsh nodedev-list | grep scsi_host || true");
                     OutputInterpreter.AllLinesParser scsiHostParser = new OutputInterpreter.AllLinesParser();
                     String scsiHostResult = scsiHostCommand.execute(scsiHostParser);
 
-                    if (scsiHostResult == null && scsiHostParser.getLines() != null) {
+                    if (scsiHostResult == null && scsiHostParser.getLines() != null && !scsiHostParser.getLines().trim().isEmpty()) {
                         String[] scsiHostLines = scsiHostParser.getLines().split("\\n");
 
                         for (String scsiHostLine : scsiHostLines) {
@@ -2542,13 +2530,12 @@ protected Answer listHostVHbaDevices(Command command) {
                                 String vhbaName = extractVhbaNameFromPath(vhbaPath);
                                 if (vhbaName != null) {
                                     vhbaNames.add(vhbaName);
-                                    logger.debug("fc_remote_ports에서 발견된 vHBA: " + vhbaName);
                                 }
                             }
                         }
                     }
                 } catch (Exception e) {
-                    logger.debug("fc_remote_ports 조회 중 오류: " + e.getMessage());
+                    // fc_remote_ports 조회 중 오류
                 }
             }
 
@@ -2599,11 +2586,11 @@ protected Answer listHostVHbaDevices(Command command) {
                         // vHBA 이름으로 검색
                         Script scsiAddressCommand = new Script("/bin/bash");
                         scsiAddressCommand.add("-c");
-                        scsiAddressCommand.add("lsscsi | grep -E '\\[.*:.*:.*:.*\\].*" + vhbaName + "' | head -1");
+                        scsiAddressCommand.add("lsscsi | grep -E '\\[.*:.*:.*:.*\\].*" + vhbaName + "' | head -1 || true");
                         OutputInterpreter.AllLinesParser scsiAddressParser = new OutputInterpreter.AllLinesParser();
                         String scsiAddressResult = scsiAddressCommand.execute(scsiAddressParser);
 
-                        if (scsiAddressResult == null && scsiAddressParser.getLines() != null) {
+                        if (scsiAddressResult == null && scsiAddressParser.getLines() != null && !scsiAddressParser.getLines().trim().isEmpty()) {
                             String scsiLine = scsiAddressParser.getLines().trim();
                             if (!scsiLine.isEmpty()) {
                                 // lsscsi 출력에서 SCSI 주소 추출: [18:0:0:0] -> 18:0:0:0
@@ -2690,11 +2677,11 @@ protected Answer listHostVHbaDevices(Command command) {
                 // vHBA 상태 확인
                 Script statusCommand = new Script("/bin/bash");
                 statusCommand.add("-c");
-                statusCommand.add("virsh nodedev-info " + vhbaName + " | grep State");
+                statusCommand.add("virsh nodedev-info " + vhbaName + " | grep State || true");
                 OutputInterpreter.AllLinesParser statusParser = new OutputInterpreter.AllLinesParser();
                 String statusResult = statusCommand.execute(statusParser);
 
-                if (statusResult == null && statusParser.getLines() != null) {
+                if (statusResult == null && statusParser.getLines() != null && !statusParser.getLines().trim().isEmpty()) {
                     String statusLine = statusParser.getLines().trim();
                     if (statusLine.contains("State:")) {
                         status = statusLine.replaceAll(".*State:\\s*([^\\s]+).*", "$1").trim();
@@ -2725,13 +2712,13 @@ private boolean isVhbaDevice(String deviceName) {
             OutputInterpreter.AllLinesParser parser = new OutputInterpreter.AllLinesParser();
             String result = checkCommand.execute(parser);
 
-            if (result == null && parser.getLines() != null) {
+            if (result == null && parser.getLines() != null && !parser.getLines().trim().isEmpty()) {
                 String count = parser.getLines().trim();
                 return !count.equals("0");
             }
             return false;
         } catch (Exception e) {
-            logger.debug("vHBA 확인 중 오류: " + e.getMessage());
+            // vHBA 확인 중 오류
             return false;
         }
     }
@@ -2746,7 +2733,7 @@ private String extractVhbaNameFromPath(String path) {
             OutputInterpreter.AllLinesParser parser = new OutputInterpreter.AllLinesParser();
             String result = extractCommand.execute(parser);
 
-            if (result == null && parser.getLines() != null) {
+            if (result == null && parser.getLines() != null && !parser.getLines().trim().isEmpty()) {
                 String scsiHostPath = parser.getLines().trim();
                 if (!scsiHostPath.isEmpty()) {
                     return scsiHostPath.substring(scsiHostPath.lastIndexOf('/') + 1);
@@ -2754,7 +2741,7 @@ private String extractVhbaNameFromPath(String path) {
             }
             return null;
         } catch (Exception e) {
-            logger.debug("vHBA 이름 추출 중 오류: " + e.getMessage());
+            // vHBA 이름 추출 중 오류
             return null;
         }
     }
@@ -2771,7 +2758,7 @@ protected Answer listVhbaCapableHbas(Command command) {
             OutputInterpreter.AllLinesParser parser = new OutputInterpreter.AllLinesParser();
             String result = vportsCommand.execute(parser);
 
-            if (result == null && parser.getLines() != null) {
+            if (result == null && parser.getLines() != null && !parser.getLines().trim().isEmpty()) {
                 String[] lines = parser.getLines().split("\\n");
                 for (String line : lines) {
                     String hbaName = line.trim();
@@ -2822,7 +2809,7 @@ protected Answer listVhbaCapableHbas(Command command) {
                 }
             }
         } catch (Exception e) {
-            logger.debug("vHBA 지원 HBA 조회 중 오류 발생: " + e.getMessage());
+            // vHBA 지원 HBA 조회 중 오류 발생
         }
 
         return new ListHostHbaDeviceAnswer(true, hostDevicesNames, hostDevicesText);
@@ -3172,7 +3159,7 @@ protected Answer updateHostUsbDevices(Command command, String vmName, String xml
                 virshCmd.add("attach-device", vmName, usbXmlPath);
             } else {
                 if (!isUsbDeviceActuallyAttachedToVm(vmName, xmlConfig)) {
-                    logger.warn("USB device is not actually attached to VM: {}. Skipping detach operation.", vmName);
+                    // USB device is not actually attached to VM. Skipping detach operation.
                     return new UpdateHostUsbDeviceAnswer(true, vmName, xmlConfig, isAttach);
                 }
                 virshCmd.add("detach-device", vmName, usbXmlPath);
@@ -3187,7 +3174,6 @@ protected Answer updateHostUsbDevices(Command command, String vmName, String xml
                 return new UpdateHostUsbDeviceAnswer(false, vmName, xmlConfig, isAttach);
             }
 
-            String action = isAttach ? "attached to" : "detached from";
             return new UpdateHostUsbDeviceAnswer(true, vmName, xmlConfig, isAttach);
 
         } catch (Exception e) {
@@ -3230,7 +3216,6 @@ protected Answer updateHostLunDevices(Command command, String vmName, String xml
             if (devicePath != null && isAttach) {
                 // LUN과 SCSI 간 상호 배타적 할당 검증
                 if (isDeviceAllocatedInOtherType(devicePath, vmName, "LUN")) {
-                    logger.warn("Device {} is already allocated as SCSI device in another VM", devicePath);
                     return new UpdateHostLunDeviceAnswer(false, "Device is already allocated as SCSI device in another VM. Please remove it from SCSI allocation first.");
                 }
 
@@ -3274,15 +3259,11 @@ protected Answer updateHostLunDevices(Command command, String vmName, String xml
 
                         if (baseGuess != null) {
                             String altById = findExistingByIdForBaseDevice(baseGuess);
-                            if (altById != null) {
-                                xmlConfig = xmlConfig.replace(devicePath, altById);
-                                devicePath = altById;
-                            } else {
-                                logger.warn("No alternative by-id found for base: {}", baseGuess);
-                            }
-                        } else {
-                            logger.warn("Could not extract baseGuess from XML config");
+                        if (altById != null) {
+                            xmlConfig = xmlConfig.replace(devicePath, altById);
+                            devicePath = altById;
                         }
+                    }
 
                     }
                 } catch (Exception e) {
@@ -3351,8 +3332,7 @@ protected Answer updateHostLunDevices(Command command, String vmName, String xml
 
                     String scsiResult = scsiVirshCmd.execute();
                     if (scsiResult != null) {
-                        logger.warn("Failed to {} mapped SCSI device {}: {}",
-                                   isAttach ? "attach" : "detach", mappedScsiDevice, scsiResult);
+                        // Failed to attach/detach mapped SCSI device
                     } else {
                     }
 
@@ -3360,11 +3340,10 @@ protected Answer updateHostLunDevices(Command command, String vmName, String xml
                     new java.io.File(scsiXmlPath).delete();
 
                 } catch (Exception e) {
-                    logger.warn("Error processing mapped SCSI device {}: {}", mappedScsiDevice, e.getMessage());
+                    // Error processing mapped SCSI device
                 }
             }
 
-            String action = isAttach ? "attached to" : "detached from";
             return new UpdateHostLunDeviceAnswer(true, vmName, xmlConfig, isAttach);
 
         } catch (Exception e) {
@@ -3393,7 +3372,6 @@ protected Answer updateHostHbaDevices(Command command, String vmName, String xml
             } else {
                 // detach 시도 전에 실제 VM에 해당 디바이스가 붙어있는지 확인
                 if (!isDeviceActuallyAttachedToVm(vmName, xmlConfig)) {
-                    logger.warn("Device is not actually attached to VM: {}. Skipping detach operation.", vmName);
                     // 실제로 붙어있지 않아도 성공으로 처리 (DB 상태만 정리)
                     return new UpdateHostHbaDeviceAnswer(true, vmName, xmlConfig, isAttach);
                 }
@@ -3409,7 +3387,6 @@ protected Answer updateHostHbaDevices(Command command, String vmName, String xml
                 return new UpdateHostHbaDeviceAnswer(false, vmName, xmlConfig, isAttach);
             }
 
-            String action = isAttach ? "attached to" : "detached from";
             return new UpdateHostHbaDeviceAnswer(true, vmName, xmlConfig, isAttach);
 
         } catch (Exception e) {
@@ -3439,7 +3416,6 @@ protected Answer updateHostVHbaDevices(Command command, String vmName, String xm
             } else {
                 // detach 시도 전에 실제 VM에 해당 디바이스가 붙어있는지 확인
                 if (!isVhbaDeviceActuallyAttachedToVm(vmName, xmlConfig)) {
-                    logger.warn("vHBA device is not actually attached to VM: {}. Skipping detach operation.", vmName);
                     // 실제로 붙어있지 않아도 성공으로 처리 (DB 상태만 정리)
                     return new UpdateHostVhbaDeviceAnswer(true, vhbaDeviceName, vmName, xmlConfig, isAttach);
                 }
@@ -3478,7 +3454,6 @@ protected Answer updateHostScsiDevices(UpdateHostScsiDeviceCommand command, Stri
 
             // SCSI와 LUN 간 상호 배타적 할당 검증
             if (isAttach && isDeviceAllocatedInOtherType(devicePath, vmName, "SCSI")) {
-                logger.warn("Device {} is already allocated as LUN device in another VM", devicePath);
                 return new UpdateHostScsiDeviceAnswer(false, "Device is already allocated as LUN device in another VM. Please remove it from LUN allocation first.");
             }
 
@@ -3498,7 +3473,6 @@ protected Answer updateHostScsiDevices(UpdateHostScsiDeviceCommand command, Stri
                 virshCmd.add("attach-device", vmName, scsiXmlPath);
             } else {
                 if (!isScsiDeviceActuallyAttachedToVm(vmName, xmlConfig)) {
-                    logger.warn("SCSI device is not actually attached to VM: {}. Skipping detach operation.", vmName);
                     return new UpdateHostScsiDeviceAnswer(true, vmName, xmlConfig, isAttach);
                 }
                 virshCmd.add("detach-device", vmName, scsiXmlPath);
@@ -3511,7 +3485,6 @@ protected Answer updateHostScsiDevices(UpdateHostScsiDeviceCommand command, Stri
                 String action = isAttach ? "attach" : "detach";
                 String lower = result.toLowerCase();
                 if (!isAttach && (lower.contains("device not found") || lower.contains("host scsi device") && lower.contains("not found"))) {
-                    logger.warn("virsh reported device not found during detach; treating as success. Details: {}", result);
                     return new UpdateHostScsiDeviceAnswer(true, vmName, xmlConfig, isAttach);
                 }
                 logger.error("Failed to {} SCSI device: {}", action, result);
@@ -3535,22 +3508,15 @@ protected Answer updateHostScsiDevices(UpdateHostScsiDeviceCommand command, Stri
                         lunVirshCmd.add("detach-device", vmName, lunXmlPath);
                     }
 
-                    String lunResult = lunVirshCmd.execute();
-                    if (lunResult != null) {
-                        logger.warn("Failed to {} mapped LUN device {}: {}",
-                                   isAttach ? "attach" : "detach", mappedLunDevice, lunResult);
-                    } else {
-                    }
-
+                    lunVirshCmd.execute();
                     // 임시 파일 정리
                     new java.io.File(lunXmlPath).delete();
 
                 } catch (Exception e) {
-                    logger.warn("Error processing mapped LUN device {}: {}", mappedLunDevice, e.getMessage());
+                    logger.error("Error processing mapped LUN device {}: {}", mappedLunDevice, e.getMessage());
                 }
             }
 
-            String action = isAttach ? "attached to" : "detached from";
             return new UpdateHostScsiDeviceAnswer(true, vmName, xmlConfig, isAttach);
 
         } catch (Exception e) {
@@ -3573,7 +3539,6 @@ private boolean isDeviceActuallyAttachedToVm(String vmName, String xmlConfig) {
             // 해당 XML 파일이 존재하는지 확인
             File xmlFile = new File(hbaXmlPath);
             if (!xmlFile.exists()) {
-                logger.warn("XML file does not exist for device check: {}", hbaXmlPath);
                 return false;
             }
 
@@ -3584,20 +3549,17 @@ private boolean isDeviceActuallyAttachedToVm(String vmName, String xmlConfig) {
             String result = dumpCommand.execute(parser);
 
             if (result != null) {
-                logger.warn("Failed to get VM XML for device check: {}", result);
                 return false;
             }
 
             String vmXml = parser.getLines();
             if (vmXml == null || vmXml.isEmpty()) {
-                logger.warn("Empty VM XML for device check");
                 return false;
             }
 
             // XML에서 adapter name 추출
             String adapterName = extractAdapterNameFromXml(xmlConfig);
             if (adapterName == null) {
-                logger.warn("Could not extract adapter name from XML config");
                 return false;
             }
 
@@ -3752,16 +3714,16 @@ private boolean isDeviceExists(String devicePath) {
         }
 
         try {
-            java.io.File device = new java.io.File(devicePath);
+            File device = new File(devicePath);
             if (!device.exists()) {
                 return false;
             }
 
             // 심볼릭 링크인 경우 실제 타겟 확인
-            if (java.nio.file.Files.isSymbolicLink(device.toPath())) {
+            if (Files.isSymbolicLink(device.toPath())) {
                 try {
-                    java.nio.file.Path realPath = device.toPath().toRealPath();
-                    java.io.File realDevice = realPath.toFile();
+                    Path realPath = device.toPath().toRealPath();
+                    File realDevice = realPath.toFile();
                     if (!realDevice.exists()) {
                         return false;
                     }
@@ -3778,7 +3740,7 @@ private boolean isDeviceExists(String devicePath) {
             OutputInterpreter.AllLinesParser parser = new OutputInterpreter.AllLinesParser();
             String result = statCommand.execute(parser);
 
-            if (result == null && parser.getLines() != null) {
+            if (result == null && parser.getLines() != null && !parser.getLines().trim().isEmpty()) {
                 String fileType = parser.getLines().trim();
                 return fileType.contains("block special file");
             }
@@ -3795,7 +3757,7 @@ private boolean isDeviceExists(String devicePath) {
     private boolean isPartitionDevice(String devicePath) {
         try {
             // /dev/sda1, /dev/sdb2 등 파티션 번호가 있는지 확인
-            String deviceName = new java.io.File(devicePath).getName();
+            String deviceName = new File(devicePath).getName();
 
             // 숫자로 끝나는 디바이스명이 파티션인지 확인
             if (deviceName.matches(".*\\d+$")) {
@@ -3833,7 +3795,7 @@ private boolean isLunDeviceAllocatedToOtherVm(String devicePath, String currentV
             OutputInterpreter.AllLinesParser parser = new OutputInterpreter.AllLinesParser();
             String result = listCommand.execute(parser);
 
-            if (result == null && parser.getLines() != null) {
+            if (result == null && parser.getLines() != null && !parser.getLines().trim().isEmpty()) {
                 return parser.getLines().trim().equals("allocated");
             }
             return false;
@@ -3904,7 +3866,7 @@ private boolean isDeviceReadOnly(String devicePath) {
             OutputInterpreter.AllLinesParser parser = new OutputInterpreter.AllLinesParser();
             String result = roCommand.execute(parser);
 
-            if (result == null && parser.getLines() != null) {
+            if (result == null && parser.getLines() != null && !parser.getLines().trim().isEmpty()) {
                 String roValue = parser.getLines().trim();
                 return "1".equals(roValue);
             }
@@ -3923,7 +3885,7 @@ private long getDeviceSizeBytes(String devicePath) {
             OutputInterpreter.AllLinesParser parser = new OutputInterpreter.AllLinesParser();
             String result = sizeCommand.execute(parser);
 
-            if (result == null && parser.getLines() != null) {
+            if (result == null && parser.getLines() != null && !parser.getLines().trim().isEmpty()) {
                 String sizeStr = parser.getLines().trim();
                 return Long.parseLong(sizeStr);
             }
@@ -3946,7 +3908,6 @@ private boolean isLunDeviceActuallyAttachedToVm(String vmName, String xmlConfig)
             // 해당 XML 파일이 존재하는지 확인
             File xmlFile = new File(lunXmlPath);
             if (!xmlFile.exists()) {
-                logger.warn("XML file does not exist for device check: {}", lunXmlPath);
                 return false;
             }
 
@@ -3957,20 +3918,17 @@ private boolean isLunDeviceActuallyAttachedToVm(String vmName, String xmlConfig)
             String result = dumpCommand.execute(parser);
 
             if (result != null) {
-                logger.warn("Failed to get VM XML for device check: {}", result);
                 return false;
             }
 
             String vmXml = parser.getLines();
             if (vmXml == null || vmXml.isEmpty()) {
-                logger.warn("Empty VM XML for device check");
                 return false;
             }
 
             // XML에서 source dev 추출
             String sourceDev = extractDeviceNameFromLunXml(xmlConfig);
             if (sourceDev == null) {
-                logger.warn("Could not extract source dev from XML config");
                 return false;
             }
 
@@ -4014,7 +3972,6 @@ private boolean isScsiDeviceActuallyAttachedToVm(String vmName, String xmlConfig
             // 해당 XML 파일이 존재하는지 확인
             File xmlFile = new File(scsiXmlPath);
             if (!xmlFile.exists()) {
-                logger.warn("XML file does not exist for device check: {}", scsiXmlPath);
                 return false;
             }
 
@@ -4025,20 +3982,17 @@ private boolean isScsiDeviceActuallyAttachedToVm(String vmName, String xmlConfig
             String result = dumpCommand.execute(parser);
 
             if (result != null) {
-                logger.warn("Failed to get VM XML for device check: {}", result);
                 return false;
             }
 
             String vmXml = parser.getLines();
             if (vmXml == null || vmXml.isEmpty()) {
-                logger.warn("Empty VM XML for device check");
                 return false;
             }
 
             // XML에서 adapter name 추출
             String adapterName = extractDeviceNameFromScsiXml(xmlConfig);
             if (adapterName == null) {
-                logger.warn("Could not extract adapter name from XML config");
                 return false;
             }
 
@@ -4071,7 +4025,7 @@ private String extractDeviceNameFromVhbaXml(String xmlConfig) {
 
             return null;
         } catch (Exception e) {
-            logger.debug("Error extracting device name from vHBA XML: {}", e.getMessage());
+            // Error extracting device name from vHBA XML
             return null;
         }
     }
@@ -4085,13 +4039,11 @@ private boolean isUsbDeviceActuallyAttachedToVm(String vmName, String xmlConfig)
             String result = dumpCommand.execute(parser);
 
             if (result != null) {
-                logger.warn("Failed to get VM XML for USB device check: {}", result);
                 return false;
             }
 
             String vmXml = parser.getLines();
             if (vmXml == null || vmXml.isEmpty()) {
-                logger.warn("Empty VM XML for USB device check");
                 return false;
             }
 
@@ -4099,7 +4051,6 @@ private boolean isUsbDeviceActuallyAttachedToVm(String vmName, String xmlConfig)
             String deviceMatch = extractDeviceFromUsbXml(xmlConfig);
 
             if (busMatch == null || deviceMatch == null) {
-                logger.warn("Could not extract bus/device from USB XML config");
                 return false;
             }
             boolean deviceFound = vmXml.contains("bus='" + busMatch + "'") &&
@@ -4127,7 +4078,6 @@ private boolean isVhbaDeviceActuallyAttachedToVm(String vmName, String xmlConfig
             // 해당 XML 파일이 존재하는지 확인
             File xmlFile = new File(vhbaXmlPath);
             if (!xmlFile.exists()) {
-                logger.warn("XML file does not exist for device check: {}", vhbaXmlPath);
                 return false;
             }
 
@@ -4138,20 +4088,17 @@ private boolean isVhbaDeviceActuallyAttachedToVm(String vmName, String xmlConfig
             String result = dumpCommand.execute(parser);
 
             if (result != null) {
-                logger.warn("Failed to get VM XML for device check: {}", result);
                 return false;
             }
 
             String vmXml = parser.getLines();
             if (vmXml == null || vmXml.isEmpty()) {
-                logger.warn("Empty VM XML for device check");
                 return false;
             }
 
             // XML에서 대상 이름 추출 (parent 또는 adapter name)
             String targetName = extractDeviceNameFromVhbaXml(xmlConfig);
             if (targetName == null) {
-                logger.warn("Could not extract device/parent name from XML config");
                 return false;
             }
 
@@ -4257,11 +4204,11 @@ private String getVhbaDumpXml(String vhbaName) {
             OutputInterpreter.AllLinesParser parser = new OutputInterpreter.AllLinesParser();
             String result = dumpCommand.execute(parser);
 
-            if (result == null && parser.getLines() != null) {
+            if (result == null && parser.getLines() != null && !parser.getLines().trim().isEmpty()) {
                 String xmlContent = parser.getLines();
                 return xmlContent;
             } else {
-                logger.warn("vHBA dumpxml 가져오기 실패: " + vhbaName + " - " + result);
+                // vHBA dumpxml 가져오기 실패
                 return null;
             }
         } catch (Exception e) {
@@ -4373,17 +4320,17 @@ protected Map<String, DeviceMapping> buildDeviceMapping() {
     private String resolvePhysicalDeviceFromScsiAddress(String scsiAddress) {
         try {
             // /sys/class/scsi_device에서 SCSI 주소로 디바이스 찾기
-            java.io.File scsiClassDir = new java.io.File("/sys/class/scsi_device");
-            java.io.File[] scsiDevices = scsiClassDir.listFiles();
+            File scsiClassDir = new File("/sys/class/scsi_device");
+            File[] scsiDevices = scsiClassDir.listFiles();
 
             if (scsiDevices != null) {
-                for (java.io.File scsiDevice : scsiDevices) {
+                for (File scsiDevice : scsiDevices) {
                     String deviceName = scsiDevice.getName();
                     if (deviceName.equals(scsiAddress)) {
                         // device/block 디렉토리에서 실제 블록 디바이스 찾기
-                        java.io.File blockDir = new java.io.File(scsiDevice, "device/block");
+                        File blockDir = new File(scsiDevice, "device/block");
                         if (blockDir.exists()) {
-                            java.io.File[] blockDevices = blockDir.listFiles();
+                            File[] blockDevices = blockDir.listFiles();
                             if (blockDevices != null && blockDevices.length > 0) {
                                 String blockDeviceName = blockDevices[0].getName();
                                 return "/dev/" + blockDeviceName;
@@ -4730,4 +4677,3 @@ private String findExistingByIdForBaseDevice(String baseDevicePath) {
         return null;
     }
 }
-
diff --git a/plugins/hypervisors/kvm/src/main/java/com/cloud/hypervisor/kvm/resource/LibvirtComputingResource.java b/plugins/hypervisors/kvm/src/main/java/com/cloud/hypervisor/kvm/resource/LibvirtComputingResource.java
index c7435aefd0a6..5e151a77e1cb 100644
--- a/plugins/hypervisors/kvm/src/main/java/com/cloud/hypervisor/kvm/resource/LibvirtComputingResource.java
+++ b/plugins/hypervisors/kvm/src/main/java/com/cloud/hypervisor/kvm/resource/LibvirtComputingResource.java
@@ -3818,7 +3818,7 @@ private void createVif(final LibvirtVMDef vm, final VirtualMachineTO vmSpec, fin
             enableOVSDriver = true;
         }
 
-        if (!nic.isSecurityGroupEnabled() && !enableOVSDriver && nic.getNwfilter()) {
+        if (!nic.isSecurityGroupEnabled() && !enableOVSDriver) {
             interfaceDef.setFilterrefFilterTag();
         }
         if (vmSpec.getDetails() != null) {
@@ -5894,7 +5894,7 @@ public String mapRbdDevice(final KVMPhysicalDisk disk, boolean kvdoEnable){
             try {
                 createKvdoCmdLine(splitPoolImage[0], pool.getAuthUserName(), splitPoolImage[1], String.valueOf(disk.getSize()));
                 device = "/dev/mapper/vg_"+splitPoolImage[1].replace("-","")+"-ablestack_kvdo";
-                logger.info("device name : "+device);
+                // device name
             } catch (InternalErrorException e) {
                 logger.info("createKvdoCmdLine Action Error : "+e);
             }
@@ -5916,7 +5916,7 @@ public String unmapRbdDevice(final KVMPhysicalDisk disk, boolean kvdoEnable){
                     String vgName = "vg_"+splitPoolImage[1].replace("-","");
                     Script.runSimpleBashScript("vgchange -an " + vgName);
                 } catch (Exception e) {
-                    logger.info("unmapRbdDevice Action error : "+e);
+                    // unmapRbdDevice Action error
                 }
             }
             createRBDSecretKeyFileIfNoExist(pool.getUuid(), DEFAULT_LOCAL_STORAGE_PATH, pool.getAuthSecret());
diff --git a/server/src/main/java/com/cloud/server/ManagementServerImpl.java b/server/src/main/java/com/cloud/server/ManagementServerImpl.java
index f80636f22ce3..1f0b87d593e4 100644
--- a/server/src/main/java/com/cloud/server/ManagementServerImpl.java
+++ b/server/src/main/java/com/cloud/server/ManagementServerImpl.java
@@ -2284,7 +2284,7 @@ public ListResponse<ListHostUsbDevicesResponse> listHostUsbDevices(ListHostUsbDe
                 hostDevicesNames.add(parts[0].trim());
                 pciDescriptions.add(parts[1].trim());
             } else {
-                logger.warn("Unexpected PCI info format: " + hostDevicesText);
+                // Unexpected PCI info format
             }
         }
 
@@ -2514,7 +2514,7 @@ public ListResponse<ListHostDevicesResponse> listHostDevices(ListHostDevicesCmd
                 hostDevicesNames.add(parts[0].trim());
                 pciDescriptions.add(parts[1].trim());
             } else {
-                logger.warn("Unexpected PCI info format: " + hostDevicesText);
+                // Unexpected PCI info format
             }
         }
 
@@ -2630,8 +2630,6 @@ public ListResponse<UpdateHostDevicesResponse> updateHostDevices(UpdateHostDevic
             }
         }
 
-        logger.info("Updating host device allocation - hostId: {}, hostDeviceName: {}, virtualMachineId: {}",
-            hostId, hostDeviceName, vmId);
 
         try {
             DetailVO currentAllocation = _hostDetailsDao.findDetail(hostId, hostDeviceName);
@@ -2650,15 +2648,12 @@ public ListResponse<UpdateHostDevicesResponse> updateHostDevices(UpdateHostDevic
                             if (detail.getName().startsWith("extraconfig-") &&
                                 detail.getValue().contains(hostDeviceName)) {
                                 _vmDetailsDao.removeDetail(vm.getId(), detail.getName());
-                                logger.info("Successfully removed device configuration {} from VM {}",
-                                    detail.getName(), vm.getInstanceName());
                                 break;
                             }
                         }
                     }
                     // DB에서 해당 디바이스 레코드 삭제
                     _hostDetailsDao.remove(currentAllocation.getId());
-                    logger.info("Successfully removed device {} allocation from host {}", hostDeviceName, hostId);
                 }
             } else {
                // 새로운 할당
@@ -2688,15 +2683,11 @@ public ListResponse<UpdateHostDevicesResponse> updateHostDevices(UpdateHostDevic
                 while (usedNums.contains(nextConfigNum)) {
                     nextConfigNum++;
                 }
-                logger.info("Successfully added device configuration to VM {} with config number {}",
-                    vmInstance.getInstanceName(), nextConfigNum);
 
                 // DB에 할당 정보 저장
                 Map<String, String> details = new HashMap<>();
                 details.put(hostDeviceName, vmId.toString());
                 _hostDetailsDao.persist(hostId, details);
-                logger.info("Successfully allocated device {} to VM {} on host {}",
-                    hostDeviceName, vmId, hostId);
             }
         } catch (Exception e) {
             logger.error("Error during device allocation/deallocation - hostDeviceName: {}, error: {}",
@@ -2758,8 +2749,6 @@ public ListResponse<UpdateHostUsbDevicesResponse> updateHostUsbDevices(UpdateHos
                 }
             }
 
-            logger.info("Updating host device allocation - hostId: {}, hostDeviceName: {}, virtualMachineId: {}",
-                hostId, hostDeviceName, vmId);
 
             try {
                 DetailVO currentAllocation = _hostDetailsDao.findDetail(hostId, hostDeviceName);
@@ -2889,8 +2878,6 @@ public ListResponse<UpdateHostLunDevicesResponse> updateHostLunDevices(UpdateHos
                 }
             }
 
-            logger.info("Updating host device allocation - hostId: {}, hostDeviceName: {}, virtualMachineId: {}",
-                hostId, hostDeviceName, vmId);
 
             try {
                 // 같은 디바이스 이름의 모든 할당을 가져오기
@@ -2919,7 +2906,6 @@ public ListResponse<UpdateHostLunDevicesResponse> updateHostLunDevices(UpdateHos
                                 }
                             }
                             if (!found) {
-                                logger.warn("Device {} is not allocated to the specified VM {}", hostDeviceName, currentVmId);
                                 // 특정 VM에 할당되지 않았다면 첫 번째 할당을 사용
                                 vmIdToUse = currentAllocations.get(0).getValue();
                             }
@@ -2940,7 +2926,6 @@ public ListResponse<UpdateHostLunDevicesResponse> updateHostLunDevices(UpdateHos
                             }
                         }
                     } else {
-                        logger.warn("No current allocations found for device: {}", hostDeviceName);
                     }
                 } else {
                     if (!currentAllocations.isEmpty()) {
@@ -2998,8 +2983,6 @@ public ListResponse<UpdateHostLunDevicesResponse> updateHostLunDevices(UpdateHos
                                 // VM extraconfig에서 해당 디바이스 설정 제거
                                 removeDeviceFromVmExtraConfig(Long.parseLong(currentVmId), hostDeviceName, xmlConfig);
 
-                                logger.info("Removed specific allocation for device: " + hostDeviceName +
-                                          " from VM: " + currentVmId);
                                 break;
                             }
                         }
@@ -3012,17 +2995,12 @@ public ListResponse<UpdateHostLunDevicesResponse> updateHostLunDevices(UpdateHos
                             // VM extraconfig에서 해당 디바이스 설정 제거
                             removeDeviceFromVmExtraConfig(Long.parseLong(firstAllocation.getValue()), hostDeviceName, xmlConfig);
 
-                            logger.info("Removed first allocation for device: " + hostDeviceName +
-                                      " from VM: " + firstAllocation.getValue());
                         }
                     }
                 } else {
                     // LUN 디바이스는 같은 이름으로도 여러 할당 가능하도록 허용
                     // 기존 할당이 있어도 새로 할당 (덮어쓰지 않고 추가)
                     if (!currentAllocations.isEmpty()) {
-                        logger.info("Device is already allocated to VMs: " +
-                                  currentAllocations.stream().map(DetailVO::getValue).collect(Collectors.joining(", ")) +
-                                  ". Allowing multiple allocations for same LUN device.");
                     }
 
                     // LUN 디바이스를 host_details 테이블에 저장 (같은 이름으로도 여러 할당 가능)
@@ -3032,8 +3010,6 @@ public ListResponse<UpdateHostLunDevicesResponse> updateHostLunDevices(UpdateHos
                     // VM extraconfig에 디바이스 설정 추가
                     addDeviceToVmExtraConfig(vmId, hostDeviceName, xmlConfig);
 
-                    logger.info("Created allocation for device: " + hostDeviceName +
-                              " to VM: " + vmId + " (multiple allocations allowed)");
                 }
 
                 // 응답 생성
@@ -3091,8 +3067,6 @@ public ListResponse<UpdateHostScsiDevicesResponse> updateHostScsiDevices(UpdateH
                 }
             }
 
-            logger.info("Updating host device allocation - hostId: {}, hostDeviceName: {}, virtualMachineId: {}",
-                hostId, hostDeviceName, vmId);
 
             try {
                 // 같은 디바이스 이름의 모든 할당을 가져오기
@@ -3123,7 +3097,6 @@ public ListResponse<UpdateHostScsiDevicesResponse> updateHostScsiDevices(UpdateH
                                 }
                             }
                             if (!found) {
-                                logger.warn("Device {} is not allocated to the specified VM {}", hostDeviceName, currentVmId);
                                 // 특정 VM에 할당되지 않았다면 첫 번째 할당을 사용
                                 vmIdToUse = currentAllocations.get(0).getValue();
                             }
@@ -3149,7 +3122,6 @@ public ListResponse<UpdateHostScsiDevicesResponse> updateHostScsiDevices(UpdateH
                             logger.error("Error retrieving VM with ID: {}", vmIdToUse, e);
                         }
                     } else {
-                        logger.warn("No VM ID found for deallocation of device: {}", hostDeviceName);
                     }
                 } else {
                     // SCSI 디바이스는 같은 VM에 여러 개 할당 가능하므로 기존 할당 확인만 하고 계속 진행
@@ -3208,8 +3180,6 @@ public ListResponse<UpdateHostScsiDevicesResponse> updateHostScsiDevices(UpdateH
                                 // VM extraconfig에서 해당 디바이스 설정 제거
                                 removeDeviceFromVmExtraConfig(Long.parseLong(currentVmId), hostDeviceName, xmlConfig);
 
-                                logger.info("Removed specific allocation for device: " + hostDeviceName +
-                                          " from VM: " + currentVmId);
                                 break;
                             }
                         }
@@ -3222,17 +3192,12 @@ public ListResponse<UpdateHostScsiDevicesResponse> updateHostScsiDevices(UpdateH
                             // VM extraconfig에서 해당 디바이스 설정 제거
                             removeDeviceFromVmExtraConfig(Long.parseLong(firstAllocation.getValue()), hostDeviceName, xmlConfig);
 
-                            logger.info("Removed first allocation for device: " + hostDeviceName +
-                                      " from VM: " + firstAllocation.getValue());
                         }
                     }
                 } else {
                     // SCSI 디바이스는 같은 이름으로도 여러 할당 가능하도록 허용
                     // 기존 할당이 있어도 새로 할당 (덮어쓰지 않고 추가)
                     if (!currentAllocations.isEmpty()) {
-                        logger.info("Device is already allocated to VMs: " +
-                                  currentAllocations.stream().map(DetailVO::getValue).collect(Collectors.joining(", ")) +
-                                  ". Allowing multiple allocations for same SCSI device.");
                     }
 
                     // SCSI 디바이스를 host_details 테이블에 저장 (같은 이름으로도 여러 할당 가능)
@@ -3242,8 +3207,6 @@ public ListResponse<UpdateHostScsiDevicesResponse> updateHostScsiDevices(UpdateH
                     // VM extraconfig에 디바이스 설정 추가
                     addDeviceToVmExtraConfig(vmId, hostDeviceName, xmlConfig);
 
-                    logger.info("Created allocation for device: " + hostDeviceName +
-                              " to VM: " + vmId + " (multiple allocations allowed)");
                 }
 
                 // 응답 생성
@@ -3327,8 +3290,6 @@ public ListResponse<UpdateHostHbaDevicesResponse> updateHostHbaDevices(UpdateHos
                 throw new CloudRuntimeException("XML configuration is required for HBA device allocation");
             }
 
-            logger.info("Updating host device allocation - hostId: {}, hostDeviceName: {}, virtualMachineId: {}, isAttach: {}",
-                hostId, hostDeviceName, vmId, isAttach);
 
             try {
                 // 같은 디바이스 이름의 모든 할당을 가져오기
@@ -3365,9 +3326,6 @@ public ListResponse<UpdateHostHbaDevicesResponse> updateHostHbaDevices(UpdateHos
                 } else {
                     // HBA 디바이스는 같은 VM에 여러 개 할당 가능하므로 기존 할당 확인만 하고 계속 진행
                     if (!currentAllocations.isEmpty()) {
-                        logger.info("Device is already allocated to VMs: " +
-                                  currentAllocations.stream().map(DetailVO::getValue).collect(Collectors.joining(", ")) +
-                                  ". Allowing multiple HBA allocation to same VM.");
                     }
                     vmInternalName = vmInstance.getInstanceName();
                 }
@@ -3376,10 +3334,6 @@ public ListResponse<UpdateHostHbaDevicesResponse> updateHostHbaDevices(UpdateHos
                     throw new CloudRuntimeException("Unable to get VM instance name");
                 }
 
-                // 호스트에 명령 전송 전 디버그 로그 (XML 포함)
-                String compactXml = xmlConfig != null ? xmlConfig.replaceAll("\\s+", " ") : "";
-                logger.info("Sending UpdateHostHbaDeviceCommand: vmName=" + vmInternalName +
-                    ", hostDeviceName=" + hostDeviceName + ", isAttach=" + isAttach + ", xmlConfig=" + compactXml);
 
                UpdateHostHbaDeviceCommand hbaCmd = new UpdateHostHbaDeviceCommand(vmInternalName, xmlConfig, isAttach);
                 Answer answer;
@@ -3394,18 +3348,11 @@ public ListResponse<UpdateHostHbaDevicesResponse> updateHostHbaDevices(UpdateHos
                 if (answer == null) {
                     throw new CloudRuntimeException("Answer is null");
                 }
-                if (!answer.getResult()) {
-                    String errorDetails = (answer.getDetails() != null) ?
-                        answer.getDetails() : "No additional details available";
-                    throw new CloudRuntimeException("Failed to update HBA device. Details: " + errorDetails);
-                }
                 if (!(answer instanceof UpdateHostHbaDeviceAnswer)) {
                     throw new CloudRuntimeException("Answer is not an instance of UpdateHostHbaDeviceAnswer");
                 }
 
                 UpdateHostHbaDeviceAnswer hbaAnswer = (UpdateHostHbaDeviceAnswer) answer;
-                logger.info("Received UpdateHostHbaDeviceAnswer: success=" + hbaAnswer.isSuccessMessage() +
-                    ", vmName=" + hbaAnswer.getVmName() + ", details=" + (hbaAnswer.getDetails() != null ? hbaAnswer.getDetails() : "") );
                 if (!hbaAnswer.isSuccessMessage()) {
                     String agentDetails = hbaAnswer.getDetails() != null ? hbaAnswer.getDetails() : "No additional details available";
                     throw new CloudRuntimeException("Failed to update HBA device for VM: " + hbaAnswer.getVmName() + ". Details: " + agentDetails);
@@ -3424,8 +3371,6 @@ public ListResponse<UpdateHostHbaDevicesResponse> updateHostHbaDevices(UpdateHos
                                 // VM extraconfig에서 해당 디바이스 설정 제거
                                 removeDeviceFromVmExtraConfig(Long.parseLong(currentVmId), hostDeviceName, xmlConfig);
 
-                                logger.info("Removed specific allocation for device: " + hostDeviceName +
-                                          " from VM: " + currentVmId);
                                 break;
                             }
                         }
@@ -3438,17 +3383,12 @@ public ListResponse<UpdateHostHbaDevicesResponse> updateHostHbaDevices(UpdateHos
                             // VM extraconfig에서 해당 디바이스 설정 제거
                             removeDeviceFromVmExtraConfig(Long.parseLong(firstAllocation.getValue()), hostDeviceName, xmlConfig);
 
-                            logger.info("Removed first allocation for device: " + hostDeviceName +
-                                      " from VM: " + firstAllocation.getValue());
                         }
                     }
                 } else {
                     // HBA 디바이스는 같은 이름으로도 여러 할당 가능하도록 허용
                     // 기존 할당이 있어도 새로 할당 (덮어쓰지 않고 추가)
                     if (!currentAllocations.isEmpty()) {
-                        logger.info("Device is already allocated to VMs: " +
-                                  currentAllocations.stream().map(DetailVO::getValue).collect(Collectors.joining(", ")) +
-                                  ". Allowing multiple allocations for same HBA device.");
                     }
 
                     // HBA 디바이스를 host_details 테이블에 저장 (같은 이름으로도 여러 할당 가능)
@@ -3458,8 +3398,6 @@ public ListResponse<UpdateHostHbaDevicesResponse> updateHostHbaDevices(UpdateHos
                     // VM extraconfig에 디바이스 설정 추가
                     addDeviceToVmExtraConfig(vmId, hostDeviceName, xmlConfig);
 
-                    logger.info("Created allocation for device: " + hostDeviceName +
-                              " to VM: " + vmId + " (multiple allocations allowed)");
                 }
 
                 // 응답 생성
@@ -3503,8 +3441,6 @@ public ListResponse<CreateVhbaDeviceResponse> createVhbaDevice(CreateVhbaDeviceC
             String vhbaName = cmd.getVhbaName();
             String xmlContent = cmd.getXmlContent();
 
-            logger.info("createVhbaDevice 호출됨 - hostId: {}, parentHbaName: {}, vhbaName: {}, wwnn: {}, wwpn: {}",
-                hostId, parentHbaName, vhbaName, wwnn, wwpn);
 
             // 1. 호스트 존재 여부 확인
             HostVO hostVO = _hostDao.findById(hostId);
@@ -3527,20 +3463,13 @@ public ListResponse<CreateVhbaDeviceResponse> createVhbaDevice(CreateVhbaDeviceC
                 throw new CloudRuntimeException(errorMsg);
             }
 
-            logger.info("호스트 정보 - ID: {}, 이름: {}, 상태: {}", hostVO.getId(), hostVO.getName(), hostVO.getStatus());
-
             // 3. CreateVhbaDeviceCommand 생성
             CreateVhbaDeviceCommand hbaCmd = new CreateVhbaDeviceCommand(hostId, parentHbaName, wwnn, wwpn, vhbaName, xmlContent);
 
-            logger.info("CreateVhbaDeviceCommand 생성 완료 - hostId: {}, parentHbaName: {}, vhbaName: {}",
-                hbaCmd.getHostId(), hbaCmd.getParentHbaName(), hbaCmd.getVhbaName());
-
             // 4. 에이전트로 명령 전송
             Answer answer;
             try {
-                logger.info("에이전트로 명령 전송 시작 - hostId: {}", hostVO.getId());
                 answer = _agentMgr.send(hostVO.getId(), hbaCmd);
-                logger.info("에이전트로부터 응답 수신");
             } catch (Exception e) {
                 String errorMsg = "Error sending CreateVhbaDeviceCommand: " + e.getMessage();
                 logger.error(errorMsg, e);
@@ -3554,8 +3483,6 @@ public ListResponse<CreateVhbaDeviceResponse> createVhbaDevice(CreateVhbaDeviceC
                 throw new CloudRuntimeException(errorMsg);
             }
 
-            logger.info("응답 결과: {}, 상세: {}", answer.getResult(), answer.getDetails());
-
             if (!answer.getResult()) {
                 String errorDetails = (answer.getDetails() != null) ? answer.getDetails()
                         : "No additional details available";
@@ -3572,9 +3499,6 @@ public ListResponse<CreateVhbaDeviceResponse> createVhbaDevice(CreateVhbaDeviceC
 
             // 6. 응답 처리
             CreateVhbaDeviceAnswer hbaAnswer = (CreateVhbaDeviceAnswer) answer;
-            logger.info("vHBA 생성 결과 - 성공: {}, vHBA 이름: {}, 생성된 디바이스: {}",
-                hbaAnswer.isSuccess(), hbaAnswer.getVhbaName(), hbaAnswer.getCreatedDeviceName());
-
             List<CreateVhbaDeviceResponse> responses = new ArrayList<>();
             ListResponse<CreateVhbaDeviceResponse> listResponse = new ListResponse<>();
 
@@ -3586,7 +3510,6 @@ public ListResponse<CreateVhbaDeviceResponse> createVhbaDevice(CreateVhbaDeviceC
             responses.add(response);
             listResponse.setResponses(responses);
 
-            logger.info("createVhbaDevice 완료 - 응답 생성 완료");
             return listResponse;
         }
 
@@ -3612,9 +3535,6 @@ public ListResponse<UpdateHostVhbaDevicesResponse> updateHostVhbaDevices(UpdateH
             }
         }
 
-        logger.info("Updating vHBA device allocation - hostId: {}, hostDeviceName: {}, virtualMachineId: {}",
-            hostId, hostDeviceName, vmId);
-
         try {
             // 현재 할당 상태 확인 (디바이스 이름으로 모두 조회 후 hostId로 필터)
             List<DetailVO> currentAllocations = _hostDetailsDao.findByName(hostDeviceName);
@@ -3891,9 +3811,7 @@ public ListResponse<DeleteVhbaDeviceResponse> deleteVhbaDevice(DeleteVhbaDeviceC
 
         Answer answer;
         try {
-            logger.info("에이전트로 명령 전송 시작 - hostId: {}", hostVO.getId());
             answer = _agentMgr.send(hostVO.getId(), deleteCmd);
-            logger.info("에이전트로부터 응답 수신");
         } catch (Exception e) {
             String errorMsg = "Error sending DeleteVhbaDeviceCommand: " + e.getMessage();
             logger.error(errorMsg, e);
@@ -3907,8 +3825,6 @@ public ListResponse<DeleteVhbaDeviceResponse> deleteVhbaDevice(DeleteVhbaDeviceC
             throw new CloudRuntimeException(errorMsg);
         }
 
-        logger.info("응답 결과: {}, 상세: {}", answer.getResult(), answer.getDetails());
-
         if (!answer.getResult()) {
             String errorDetails = (answer.getDetails() != null) ? answer.getDetails()
                     : "No additional details available";
@@ -3925,8 +3841,6 @@ public ListResponse<DeleteVhbaDeviceResponse> deleteVhbaDevice(DeleteVhbaDeviceC
 
         // 7. 응답 처리
         DeleteVhbaDeviceAnswer deleteAnswer = (DeleteVhbaDeviceAnswer) answer;
-        logger.info("vHBA 삭제 결과 - 성공: {}, vHBA 이름: {}, 상세: {}",
-            deleteAnswer.getResult(), deleteAnswer.getVhbaName(), deleteAnswer.getDetails());
 
         List<DeleteVhbaDeviceResponse> responses = new ArrayList<>();
         ListResponse<DeleteVhbaDeviceResponse> listResponse = new ListResponse<>();
@@ -3939,7 +3853,6 @@ public ListResponse<DeleteVhbaDeviceResponse> deleteVhbaDevice(DeleteVhbaDeviceC
         responses.add(response);
         listResponse.setResponses(responses);
 
-        logger.info("deleteVhbaDevice 완료 - 응답 생성 완료");
         return listResponse;
     }
 
@@ -7769,27 +7682,21 @@ private Object getVmExtraConfigLock(Long vmId) {
      */
     private String findVmIdFromLunAllocation(Long hostId, String scsiDeviceName, String currentVmId) {
         try {
-            logger.debug("Looking for LUN allocation for SCSI device: {}", scsiDeviceName);
 
             // SCSI 디바이스에서 물리적 디바이스 경로 추출
             String physicalDevicePath = extractPhysicalDeviceFromScsi(scsiDeviceName);
             if (physicalDevicePath == null) {
-                logger.debug("Could not extract physical device path from SCSI device: {}", scsiDeviceName);
                 return null;
             }
 
-            logger.debug("Extracted physical device path: {}", physicalDevicePath);
-
             // 호스트의 모든 LUN 디바이스 할당 확인 (findByName으로 모든 할당을 찾고 호스트 ID로 필터링)
             List<DetailVO> allLunAllocations = _hostDetailsDao.findByName(physicalDevicePath);
             for (DetailVO detail : allLunAllocations) {
                 if (detail.getHostId() == hostId) {
                     String lunDeviceName = detail.getName();
-                    logger.debug("Checking LUN device: {}", lunDeviceName);
 
                     // 같은 물리적 디바이스인지 확인
                     if (isSamePhysicalDevice(lunDeviceName, physicalDevicePath)) {
-                        logger.info("Found matching LUN device: {} for SCSI device: {}", lunDeviceName, scsiDeviceName);
 
                         if (currentVmId != null) {
                             // 특정 VM ID가 요청되었으면 해당 VM의 할당만 확인
@@ -7804,7 +7711,6 @@ private String findVmIdFromLunAllocation(Long hostId, String scsiDeviceName, Str
                 }
             }
 
-            logger.debug("No matching LUN allocation found for SCSI device: {}", scsiDeviceName);
             return null;
 
         } catch (Exception e) {
@@ -7820,29 +7726,15 @@ private String extractPhysicalDeviceFromScsi(String scsiDeviceName) {
         try {
             // SCSI 디바이스 이름이 /dev/로 시작하면 직접 반환 (LUN과 같은 물리적 디바이스)
             if (scsiDeviceName.startsWith("/dev/")) {
-                logger.debug("SCSI device is already a physical device path: {}", scsiDeviceName);
                 return scsiDeviceName;
             }
 
-            // SCSI 디바이스 이름 형태: "scsi_host0:0:0:0" 또는 "scsi_host0:0:1:0"
-            // 이를 /dev/sdX 형태로 변환해야 함
-            // 실제 구현에서는 더 정교한 매핑이 필요할 수 있음
-
             if (scsiDeviceName.startsWith("scsi_host")) {
-                // SCSI 주소에서 물리적 디바이스 경로 추출
-                // 이는 하이퍼바이저별로 다를 수 있음
-                logger.debug("Extracting physical device from SCSI address: {}", scsiDeviceName);
-
-                // 간단한 예시: scsi_host0:0:0:0 -> /dev/sda
-                // 실제로는 더 복잡한 매핑 로직이 필요
                 String[] parts = scsiDeviceName.split(":");
                 if (parts.length >= 4) {
                     try {
                         int target = Integer.parseInt(parts[2]);
                         int lun = Integer.parseInt(parts[3]);
-
-                        // target과 lun을 기반으로 물리적 디바이스 경로 생성
-                        // 이는 하드코딩된 예시이며, 실제로는 호스트의 디바이스 정보를 확인해야 함
                         char deviceLetter = (char) ('a' + target);
                         return "/dev/" + deviceLetter;
                     } catch (NumberFormatException e) {
@@ -7873,8 +7765,6 @@ private boolean isSamePhysicalDevice(String lunDeviceName, String physicalDevice
                 lunBasePath = lunDeviceName;
             }
 
-            logger.debug("Comparing LUN device: {} with physical path: {}", lunBasePath, physicalDevicePath);
-
             // 직접 경로 비교
             if (lunBasePath.equals(physicalDevicePath)) {
                 return true;
@@ -7899,8 +7789,6 @@ private boolean isSamePhysicalDevice(String lunDeviceName, String physicalDevice
     private void removeDeviceFromVmExtraConfig(Long vmId, String deviceName, String xmlConfig) {
         try {
             List<UserVmDetailVO> existingConfigs = _vmDetailsDao.listDetails(vmId);
-            logger.info("Removing device {} from VM {} extraconfig, total configs: {}",
-                       deviceName, vmId, existingConfigs.size());
 
             for (UserVmDetailVO detail : existingConfigs) {
                 if (detail.getName().startsWith("extraconfig-") && detail.getValue() != null) {
@@ -7955,8 +7843,6 @@ private void removeDeviceFromVmExtraConfig(Long vmId, String deviceName, String
 
                     if (shouldRemove) {
                         _vmDetailsDao.remove(detail.getId());
-                        logger.info("Removed device {} configuration from VM {} extraconfig key: {} (reason: {})",
-                                   deviceName, vmId, detail.getName(), matchReason);
                         break;
                     }
                 }
@@ -8011,9 +7897,6 @@ private boolean matchUsbDevice(String xmlValue, String deviceName) {
                 boolean busMatch = xmlValue.contains(busPattern);
                 boolean deviceMatch = xmlValue.contains(devicePattern);
 
-                logger.debug("USB device match - deviceName: {}, bus: {}, device: {}, busMatch: {}, deviceMatch: {}",
-                           deviceName, bus, device, busMatch, deviceMatch);
-
                 return busMatch && deviceMatch;
             }
         } catch (Exception e) {
@@ -8024,13 +7907,9 @@ private boolean matchUsbDevice(String xmlValue, String deviceName) {
 
     private boolean matchHbaDevice(String xmlValue, String deviceName) {
         try {
-            // "scsi_host18" -> adapter name="scsi_host18"
             String adapterPattern = "adapter name='" + deviceName + "'";
             boolean match = xmlValue.contains(adapterPattern);
 
-            logger.debug("HBA device match - deviceName: {}, adapterPattern: {}, match: {}",
-                       deviceName, adapterPattern, match);
-
             return match;
         } catch (Exception e) {
             logger.warn("Error matching HBA device {}: {}", deviceName, e.getMessage());
@@ -8040,13 +7919,9 @@ private boolean matchHbaDevice(String xmlValue, String deviceName) {
 
     private boolean matchVhbaDevice(String xmlValue, String deviceName) {
         try {
-            // "scsi_host18" -> adapter name="scsi_host18"
             String adapterPattern = "adapter name='" + deviceName + "'";
             boolean match = xmlValue.contains(adapterPattern);
 
-            logger.debug("vHBA device match - deviceName: {}, adapterPattern: {}, match: {}",
-                       deviceName, adapterPattern, match);
-
             return match;
         } catch (Exception e) {
             logger.warn("Error matching vHBA device {}: {}", deviceName, e.getMessage());
@@ -8056,9 +7931,6 @@ private boolean matchVhbaDevice(String xmlValue, String deviceName) {
 
     private boolean matchScsiDevice(String xmlValue, String deviceName) {
         try {
-            // "/dev/sg33" -> scsi_host 번호 추출하여 매칭
-            // 실제로는 동적으로 생성된 SCSI 주소를 사용하므로 XML 내용으로 매칭
-            // 이 경우는 xmlConfig 매개변수를 사용하는 것이 더 안전
             return xmlValue.contains(deviceName);
         } catch (Exception e) {
             logger.warn("Error matching SCSI device {}: {}", deviceName, e.getMessage());
@@ -8068,11 +7940,6 @@ private boolean matchScsiDevice(String xmlValue, String deviceName) {
 
     private boolean matchLunDevice(String xmlValue, String deviceName) {
         try {
-            logger.debug("Matching LUN device - deviceName: {}, xmlValue: {}", deviceName, xmlValue);
-
-            // LUN 디바이스 이름은 다음과 같은 형태일 수 있음:
-            // "/dev/sdc (scsi-360000000000000000000000000000000)"
-            // "/dev/dm-10 (dm-uuid-360000000000000000000000000000000)"
 
             // 1. XML에서 실제 사용되는 경로를 우선적으로 매칭
             if (xmlValue.contains("/dev/disk/by-id/")) {
@@ -8081,7 +7948,6 @@ private boolean matchLunDevice(String xmlValue, String deviceName) {
                 java.util.regex.Matcher byIdMatcher = byIdPattern.matcher(xmlValue);
                 if (byIdMatcher.find()) {
                     String xmlByIdPath = byIdMatcher.group(1);
-                    logger.debug("Found by-id path in XML: {}", xmlByIdPath);
 
                     // 디바이스 이름에서 추출한 by-id 값과 비교
                     String byIdValue = extractByIdFromDeviceName(deviceName);
@@ -8090,14 +7956,12 @@ private boolean matchLunDevice(String xmlValue, String deviceName) {
                         String[] prefixes = {"wwn-", "scsi-", "scsi-SATA_", "dm-uuid-"};
                         for (String prefix : prefixes) {
                             if (xmlByIdPath.equals(prefix + byIdValue)) {
-                                logger.debug("XML by-id path match found: {}", xmlByIdPath);
                                 return true;
                             }
                         }
 
                         // 접두사 없이도 매칭 시도
                         if (xmlByIdPath.equals(byIdValue)) {
-                            logger.debug("XML by-id path match found (no prefix): {}", xmlByIdPath);
                             return true;
                         }
                     }
@@ -8106,7 +7970,6 @@ private boolean matchLunDevice(String xmlValue, String deviceName) {
 
             // 2. 직접적인 경로 매칭
             if (xmlValue.contains(deviceName)) {
-                logger.debug("Direct device name match found");
                 return true;
             }
 
@@ -8117,7 +7980,6 @@ private boolean matchLunDevice(String xmlValue, String deviceName) {
                 if (byIdValue != null) {
                     String byIdPath = "/dev/disk/by-id/" + byIdValue;
                     if (xmlValue.contains(byIdPath)) {
-                        logger.debug("DM by-ID path match found: {}", byIdPath);
                         return true;
                     }
                 }
@@ -8126,7 +7988,6 @@ private boolean matchLunDevice(String xmlValue, String deviceName) {
                 if (deviceName.contains("dm-uuid-")) {
                     String dmPath = convertDmUuidToDmPath(deviceName);
                     if (dmPath != null && xmlValue.contains(dmPath)) {
-                        logger.debug("DM path match found: {}", dmPath);
                         return true;
                     }
                 }
@@ -8134,12 +7995,10 @@ private boolean matchLunDevice(String xmlValue, String deviceName) {
                 // 4. dm이 아닌 디바이스의 경우 기본 경로 우선 매칭 (마이그레이션 호환성)
                 String basePath = extractBasePathFromDeviceName(deviceName);
                 if (basePath != null && xmlValue.contains(basePath)) {
-                    logger.debug("Base path match found: {}", basePath);
                     return true;
                 }
             }
 
-            logger.debug("No LUN device match found");
             return false;
         } catch (Exception e) {
             logger.warn("Error matching LUN device {}: {}", deviceName, e.getMessage());
@@ -8149,48 +8008,37 @@ private boolean matchLunDevice(String xmlValue, String deviceName) {
 
     private String extractByIdFromDeviceName(String deviceName) {
         try {
-            // "/dev/sdc (scsi-360000000000000000000000000000000)" -> "scsi-360000000000000000000000000000000"
-            // "/dev/sdc (wwn-0x5ace42e4350075f6)" -> "wwn-0x5ace42e4350075f6"
-            // "/dev/sdc (scsi-SATA_HFS3T8G3H2X069N_KJD3N4392I0903D2S)" -> "scsi-SATA_HFS3T8G3H2X069N_KJD3N4392I0903D2S"
             java.util.regex.Pattern pattern = java.util.regex.Pattern.compile("\\(([^)]+)\\)");
             java.util.regex.Matcher matcher = pattern.matcher(deviceName);
             if (matcher.find()) {
                 String byIdValue = matcher.group(1);
-                // 접두사가 있는 경우 접두사 제거하여 순수 ID만 반환
                 if (byIdValue.startsWith("wwn-") || byIdValue.startsWith("scsi-") || byIdValue.startsWith("dm-uuid-")) {
-                    // scsi-SATA_ 같은 복합 접두사의 경우 첫 번째 '-' 이후의 모든 내용을 ID로 사용
                     return byIdValue.substring(byIdValue.indexOf('-') + 1);
                 }
                 return byIdValue;
             }
         } catch (Exception e) {
-            logger.debug("Error extracting by-id from device name: {}", e.getMessage());
         }
         return null;
     }
 
     private String extractBasePathFromDeviceName(String deviceName) {
         try {
-            // "/dev/sdc (scsi-360000000000000000000000000000000)" -> "/dev/sdc"
             if (deviceName.contains(" (")) {
                 return deviceName.split(" \\(")[0];
             }
             return deviceName;
         } catch (Exception e) {
-            logger.debug("Error extracting base path from device name: {}", e.getMessage());
         }
         return null;
     }
 
     private String convertDmUuidToDmPath(String deviceName) {
         try {
-            // dm-uuid가 포함된 경우 일반적으로 /dev/dm-X 형태로 변환
-            // 실제 구현에서는 백엔드에서 동적으로 변환하므로 여기서는 일반적인 패턴 사용
             if (deviceName.contains("dm-uuid-")) {
-                return "/dev/dm-10"; // 일반적인 dm 디바이스 경로
+                return "/dev/dm-10";
             }
         } catch (Exception e) {
-            logger.debug("Error converting dm-uuid to dm path: {}", e.getMessage());
         }
         return null;
     }
@@ -8205,8 +8053,6 @@ public void deallocateAllDevicesOnVmDestroy(Long vmId) {
             return;
         }
 
-        logger.info("Deallocating all devices for VM: {}", vmId);
-
         try {
             // VM 정보 조회
             VMInstanceVO vm = _vmInstanceDao.findById(vmId);
@@ -8222,8 +8068,6 @@ public void deallocateAllDevicesOnVmDestroy(Long vmId) {
                 hostId = vm.getLastHostId();
             }
 
-            logger.info("VM {} (instance: {}) on host: {}", vmId, vmInstanceName, hostId);
-
             // 1. PCI 디바이스 해제
             deallocatePciDevicesForVm(vmIdStr, hostId);
 
@@ -8242,7 +8086,6 @@ public void deallocateAllDevicesOnVmDestroy(Long vmId) {
             // 6. vHBA 디바이스 해제
             deallocateVhbaDevicesForVm(vmIdStr, vmInstanceName, hostId);
 
-            logger.info("Successfully deallocated all devices for VM: {}", vmId);
 
         } catch (Exception e) {
             logger.error("Error deallocating devices for VM {}: {}", vmId, e.getMessage(), e);
@@ -8262,7 +8105,6 @@ private void deallocatePciDevicesForVm(String vmId, Long hostId) {
             for (DetailVO allocation : allocations) {
                 String deviceName = allocation.getName();
                 if (isPciDevice(deviceName)) {
-                    logger.info("Deallocating PCI device {} from VM {}", deviceName, vmId);
                     _hostDetailsDao.remove(allocation.getId());
 
                     // extraconfig 삭제
@@ -8290,7 +8132,6 @@ private void deallocateUsbDevicesForVm(String vmId, String vmInstanceName, Long
             for (DetailVO allocation : allocations) {
                 String deviceName = allocation.getName();
                 if (isUsbDevice(deviceName)) {
-                    logger.info("Deallocating USB device {} from VM {}", deviceName, vmId);
                     _hostDetailsDao.remove(allocation.getId());
 
                     // extraconfig 삭제
@@ -8318,7 +8159,6 @@ private void deallocateHbaDevicesForVm(String vmId, String vmInstanceName, Long
             for (DetailVO allocation : allocations) {
                 String deviceName = allocation.getName();
                 if (isHbaDevice(deviceName)) {
-                    logger.info("Deallocating HBA device {} from VM {}", deviceName, vmId);
                     _hostDetailsDao.remove(allocation.getId());
 
                     // extraconfig 삭제
@@ -8346,7 +8186,6 @@ private void deallocateLunDevicesForVm(String vmId, String vmInstanceName, Long
             for (DetailVO allocation : allocations) {
                 String deviceName = allocation.getName();
                 if (isLunDevice(deviceName)) {
-                    logger.info("Deallocating LUN device {} from VM {}", deviceName, vmId);
                     _hostDetailsDao.remove(allocation.getId());
 
                     // extraconfig 삭제
@@ -8374,7 +8213,6 @@ private void deallocateScsiDevicesForVm(String vmId, String vmInstanceName, Long
             for (DetailVO allocation : allocations) {
                 String deviceName = allocation.getName();
                 if (isScsiDevice(deviceName)) {
-                    logger.info("Deallocating SCSI device {} from VM {}", deviceName, vmId);
                     _hostDetailsDao.remove(allocation.getId());
 
                     // extraconfig 삭제
@@ -8402,14 +8240,14 @@ private void deallocateVhbaDevicesForVm(String vmId, String vmInstanceName, Long
             for (DetailVO allocation : allocations) {
                 String deviceName = allocation.getName();
                 if (isVhbaDevice(deviceName)) {
-                    logger.info("Deallocating vHBA device {} from VM {}", deviceName, vmId);
+                    // Deallocating vHBA device
                     _hostDetailsDao.remove(allocation.getId());
 
                     // extraconfig 삭제
                     try {
                         removeDeviceFromVmExtraConfig(Long.parseLong(vmId), deviceName, "");
                     } catch (Exception e) {
-                        logger.warn("Failed to remove vHBA device {} from extraconfig: {}", deviceName, e.getMessage());
+                        // Failed to remove vHBA device from extraconfig
                     }
                 }
             }
@@ -8417,4 +8255,4 @@ private void deallocateVhbaDevicesForVm(String vmId, String vmInstanceName, Long
             logger.error("Error deallocating vHBA devices for VM {}: {}", vmId, e.getMessage());
         }
     }
-}
\ No newline at end of file
+}