I had a breakdown and even if my host has been turned off, he showed only disconnected and HA na not kick in.
The trouble is, my Dev Environment has worked well, showing does not and HA worked, then that my production did not.
The cause of the blackout was a power failure that the power off switch.
The production host is a 3850 M2 and development hosts are HS21 blades in a BladeChassis.
What would cause the server show disconnected?
Due to the floods here, I am unable to work and check power redundancy, or if the House of all the server went down or just simply switch.
How storage is configured on the server that is located behind the failed switch. It is also configured the switch failed (iscsi or nfs), or is it fiber attached?
If its fiber attached and the other virtual machines were running, the other guests could not power on the virtual machine because files would still be locked.
What is the configuration of your HA settings on the cluster? Leave power on or power off the power?
If they all leave it turned on, and then only a physical fall of the server or SAN connection would allow an HA event succeed (because file locks would be then released). otherwise the VM running isolated, but no other host can power on the virtual machine.
It is probably a good event to happen because it caused a power failure but not a serious enough to make your life hell, it should give you more reason to push redundant switches on the side of production to ensure that a single switch failure is not bring down the environment.
Tags: VMware
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