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Dave Smith
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VEEM 6.5.0.109 Backup failure - 2008 DC.

VEEAM error -

Unable to release guest. Unfreeze error. (backup job failed. Cannot create a shadow copy of the volumes containing writers data. A VSS critical writer has failed. Writer name: NTDS (class id xxxxxxxxxxx) Writer state (VSS_WS_failed_at_post_snapshot. Error code (0X800423F4). Error: unfreeze error (backup job failed. Cannot create a shadow copy of the volumes containing written data. A VSS critical writer has failed. Written name (NTDS) VSS_WS_FAILED_AT_POST_SNAPSHOT_ERROR Code (0X800423F4)

Tried the following:

I rebooted the server.

Ran vssadmin list writers - VSS NTDS was stable and was not in an error state.

Ran job but it failed with the same error.

Ran vssadmin list writers - the VSS NTDS was in error.

Ran diskpart  - automount - the aotomatic mounting of the drives is enabled.

Deleted .bak files in the registry in the following reg area:  HKLM\Software\Microsoft\Windows NT\CurrentVersion\ProfileList

Rebooted the server.

Ran vssadmin list writers - NTDS VSS was stable and was not in an error state.

Re-ran job and it failed with the same error

Any assistance would be great.
VirtualizationVeeamWindows Server 2008

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Last Comment
Philip Elder

8/22/2022 - Mon
ASKER CERTIFIED SOLUTION
Andrew Hancock (VMware vExpert PRO / EE Fellow/British Beekeeper)

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Dave Smith

ASKER
Cheers for the reply  but I re-ran the job and it has now completed!
Philip Elder

Dave,

Please update Veeam. It's pretty far behind.
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