| I keep getting these job failures and i have gone through everything that i can think of to resolve this. does any one have any ideas or ways to fix this issue?
One or more volumes are not supported for VSS Shadow Copies. Possible causes: - Unsupported volume or file system type (eg. FAT, FAT32). - Unsupported volume size (over 64TB). - Remote or network volume not accessible. - Other, check the logs for more details.
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Question
Job Failure DDB Backup failed
+7- Vaulter
- 65 replies
Hi Thomas,
This issue occurs because VSS (Volume Shadow Copy Service) cannot create snapshots on volumes larger than 64TB. In this case, the DDB (Deduplication Database) is likely located on such a volume, which is unsupported by VSS.
To resolve this, move the DDB to a volume that is smaller than 64TB, then rerun the DDB backup. This should allow VSS to successfully create a shadow copy.
For more technical details, refer to the official Microsoft documentation:
https://learn.microsoft.com/en-us/troubleshoot/windows-server/backup-and-storage/usability-limit-volume-shadow-copy-service
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