We have a client with a VMware 5.5 host running several Windows 2012R2 virtual machines. They are using Backup Exec 2014 for backup, and the actual backups succeed or fail inconsistently. During the backup, all servers are throwing NTFS errors on the HarddiskVolumeShadowCopy volumes, such as:
Event 98, Ntfs: Volume System Reserved (\Device\HarddiskVolumeShadowCopy20) requires an Online Scan. An Online Scan will automatically run as part of the next scheduled maintenance task. Alternatively you may run "CHKDSK /SCAN" locally via the command line, or run "REPAIR-VOLUME <drive:> -SCAN" locally or remotely via PowerShell.
Event 55: A corruption was discovered in the file system structure on volume ??.
The exact nature of the corruption is unknown. The file system structures need to be scanned online.
A few days ago we had one of the VM's fail to boot because of registry corruption, but it's unclear if that was because of NTFS corruption or something to do with Windows updates. We restored a couple registry hives from the backup folder and got the server up. We don't see any NTFS errors other than when the backups run.
I've assigned a drive letter to the System Reserved Volumes and ran a chkdsk against them and they come up clean. Occasionally we will see a failed VSS NTDS writer. I thought shadow copies were stored in the System Volume Information folder, but they are not there. I've searched Symantec's knowledgebase and Google'd for clues on the errors and am coming up empty.
Can anyone lend advice on what to look for?