I have a case with small 2 hosts cluster and VNXe. These had to be shutdown because power maintenance work which caused (planned) ~6hrs blackout in power distribution. After blackout everything came up normally and system is running except that VMWare complains error "The number of vSphere HA heartbeat datastores for this host is 0, which is less than required:2". There is 5 shared datastores. I tried to turn HA off and on back again, but error persisted. In HA settings if I try to select preferred datastores I get empty list.
Tried to search for a answer but mostly came up how to disable this message, which is what I do not want.