Merge pull request #188737 from v-bllyd/patch-27

Update UserErrorFsFreezeFailed error code with Step2

Author: PRMerger20

articles/backup/backup-azure-vms-troubleshoot.md

@@ -68,6 +68,8 @@ The backup operation failed because the VM is in Failed state. For a successful
 Error code: UserErrorFsFreezeFailed <br/>
 Error message: Failed to freeze one or more mount-points of the VM to take a file-system consistent snapshot.
 
+**Step 1**
+
 * Unmount the devices for which the file system state wasn't cleaned, using the **umount** command.
 * Run a file system consistency check on these devices by using the **fsck** command.
 * Mount the devices again and retry backup operation.</ol>
@@ -81,6 +83,23 @@ MountsToSkip = /mnt/resource
 SafeFreezeWaitInSeconds=600
 ```
 
+**Step 2**
+
+* Check if there are duplicate mount points present.
+
+Identify the failed to freeze mount points from the extension log file. <br>
+For example: /boot, /usr/sap in the below sample output. 
+```
+    2017-11-02 11:22:56 Thawing: /boot
+    2017-11-02 11:22:56 Failed to FITHAW: /boot
+    2017-11-02 11:22:56 Thawing: /sapshare
+    2017-11-02 11:22:56 Thawing: /usr/sap
+    2017-11-02 11:22:56 Failed to FITHAW: /usr/sap
+```
+
+On the Linux VM execute 'mount' command and check if the failed mount points have multiple entries. If yes, remove the old entries or rename the mount path and retry the backup operation.
+
+
 ### ExtensionSnapshotFailedCOM / ExtensionInstallationFailedCOM / ExtensionInstallationFailedMDTC - Extension installation/operation failed due to a COM+ error
 
 Error code: ExtensionSnapshotFailedCOM <br/>