[ovirt-users] VDSM ConnectStorageServerVDS failed

Dear All, Is there a reason that a perfectly well working Ovirt 4.1 Engine after a power failure, would not allow the hosts to activate because of "VDSM ConnectStorageServerVDS failed". All firewalls are down, I have reinstalled the host, upgraded everything (host and engine), deleted and reinstalled hosts, I can ssh to all from all. Any clues?? Thanks ahead of time.. -- Warm Regards, JC Clark IT Director Mount Carmel School Saipan, CNMI