Hello. We had what we thought was a properly configured HA cluster but it didn't work as expected during a recent host failure. We have a stretched single cluster with two datacentres and a fully supported HP quorum-based SAN setup. We are on on 5.5 and vCenter is on the latest update and the hosts are on the last but one update.
The VMs have a soft-affinity for the hosts nearest to their SAN so would failover to any host in DR.
I don't think any of the above setup is part of the issue, I think HA itself had a problem. All hosts were connected and there were no configuration issues.
A blade was pulled from its chassis but the VMs weren't restarted elsewhere. They showed as 'Disconnected' in the client and were unable to be restarted manually until the blade was connected again.
Has anybody had experience of this?