Commvault VSA backup of vCenter failing on Application Consistent backup
‘vCenter VM’ CommVault VSA Backups
have been completing with one or more
errors on random basis, sometimes
regular: [failing on ‘VSS’ quiescing then
falls back on crash-consistent backup]
Protecting vCenter using the Virtual Server Agent:
If vCenter is running on a virtual machine, you can use an application-consistent backup
using the Virtual Server Agent to protect the virtual machine as well as the vCenter database
and files. This is the recommended method for backing up a vCenter Server Appliance.
Unable to create snapshot of VM [VCS], trying without quiescing file system
Job ID: xxxxx
Status: Completed w/ one or more errors
Client: =vCenter Server
Agent Type: VSA
Backup Set: defaultBackupSet
Subclient: VC-VM-AC [AC stands for Application Consistent here, it’ just a naming
Following VSS errors are seen in the Windows event log:
Looked up for this error on google, and found MS articles pointing to: Invalid profile entry
(*.bak) which cannot resolve the SID of the Shadow Copy writer.
Found number of *.bak profiles on : VCS
There is a Microsoft recommended solution:
1. Open the registry editor with regedit.
2. Make a backup of the registry.
3. Expand to this location and look for profile entry that has a ".bak" value appended:
4. Select and delete the entries with the extra ".bak"
5. Reboot the VM.