When a host has issues/crashes, it will be fenced by oVirt (if some power management options was enabled).
But for example when a host is fenced via iDRAC, it just reboots.
So the host comes back online, and is added directly to the oVirt cluster again.
This isn't always something we want, because what if the host crashed due to some failed hardware (DIMM/CPU/....).
It might boot again after a reset via iDRAC, but it might be needed to do some intervention on the host before you want to put it back in the cluster.
Therefor it might to good to (have an option to) put a host in maintenance mode after it was fenced. So you can do manual checks/interventions on the host before it gets back in the cluster.
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