Dear All;

I have
oVirt Engine Version: 3.5.6.2-1.el6 with three nodes running standard Centos 6.7 64bit.

The main data storage storage is on OpenFiler iScsi volume.

After rebooting the three nodes; the main data storage domain is down and all the three hosts are marked as "Non Operational"

When I try to activate any host; I get the below error message:-
"Host XXXXX cannot access the Storage Domain(s) <UNKNOWN> attached to the Data Center Default. Setting Host state to Non-Operational."

I have attached the engine and vdsm log.

Best Regards
Fawzy Ibrahim