Hi,

I have 4.1 cluster with FC block storage and hosted engine.

Last night a host went unreachable due to a driver/firmware issue with the NIC card. The Engine spotted this, the host was fenced and everything behaved as expected.

However, it got me thinking - if the affected host had been the one running the Engine, what would have happened? I'm assuming the Engine would have failed liveness check on the other hosted engine hosts and they would attempt to start the Engine. But as the "failed" host still had access to the storage (I believe the HBA was still working) then they would not be able to get a lock on the storage. In which case I'm in a catch-22, the Engine cannot fence the failed host because its network is isolated, but the Engine cannot be restarted else where until the failed host is fenced. At this point it requires human intervention to fence the failed host.