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

Challenge

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.

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