Alert: SNAPSHOT_FAILURE Snapshot initialization failed, as volume could not be added to snapshot set

Cause:

• In a failover cluster, when the clustered volume (CSV)is not available or Offline
• Snapshot is not supported for disks in a scaled-out file server architecture
• If the VM configured for backup is using SMB file share as storage and “File Server VSS Agent Service” role is not enabled

Solution:

• Check the connectivity of Clustered(CSV) volumes
• If the volume is offline or not accessible, make it online and run the backup again.

• To install “File Server VSS Agent Service” in SMB server:

  a) Open Server Manager

  b) Dashboard -> Add Roles and Features -> Under Roles -> File and Storage Services -> File and iSCSI services

  c) Select “File Server VSS Agent Service” and proceed with the installation

  d) Once the installation is done, Restart the server and configure backup