This is related to this KB: https://www.veeam.com/kb2225
The "solution" amounts to: "Add more nodes or never put your servers into maintenance mode to end up with one active node for the vSAN, ever."
Our normal setup is One Witness Node in a Datacenter, and a Two Host Cluster in each satellite office. We sometimes require a server in maintenance mode for fairly a long duration, as we don't have any on-site IT for these small offices. During these times, we are unable to perform any backups that involve VM snapshots.
I would much rather prefer to see a Warning
message for the VM backup instead of a Hard Failure
. I can take a manual snapshot, and the VM is working just fine. The problem is, if we have a node in maintenance mode or is offline due to a fault or what-have-you (the situation we are in now) Veeam simply refuses to attempt a snapshot, even though it only needs it temporarily for the duration of the backup.
P.S. I searched for this issue on the forums here and didn't find anything closely related.