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SnapManager for Hyper-V

VSS returns errors against Microsoft iSCSI Target VSS Hardware Provider during NAS backup

  • Issue

    While performing a NAS backup, the following errors might occur:

    Vss Requestor - Backup Components failed. Failed to add volume [example] to snapshot set. The shadow copy provider had an unexpected error while trying to process the specified operation.`

    Volume Shadow Copy Service error: Error creating the Shadow Copy Provider COM class with CLSID [example]. Access is denied.

  • Cause

    These errors occur during a NAS application-consistent backup. NAS backup does not fail, but VSS logs some errors related to Microsoft iSCSI Target VSS Hardware Provider.

  • Corrective action

    The backup has not failed; you can safely ignore these errors.