Backup job fails with Creating VM snapshot Error: There are currently 2 usable fault domains. The operation requires 1 more usable fault domains when backing up from vSAN cluster

KB ID:
2225
Product:
Veeam Backup & Replication
Version:
8.x, 9.x
Published:
Last Modified:
2019-04-23

Challenge

Backups fail as a result of a vSAN cluster node being offline.

Cause

If the vSAN has fewer than 4 nodes and one of the nodes is offline, either for schedule maintenance or unexpectedly, snapshots cannot be taken of VMs on the vSAN cluster.

Solution

VMware recommends having at least 4 nodes for extra fault tolerance in the event that a node would unexpectedly go down.

More Information

This can occur with clusters of more than 3 nodes if enough nodes are offline to take the cluster down to 2 or fewer online nodes.

For more details, please see: https://kb.vmware.com/s/article/2106708
 

Please be aware that we’re making changes which will restrict access to product updates for users without an active contract.

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