server 2012r2
Failover Cluster
HP SAN
2x Nodes
node b suddenly started getting source 'disk' id '153' logged in eventvwr
node a is functioning ok and all VMs are migrated to it.
disk manager reported one of the CSVs as offline - unable to bring it online - no messages - reboot took 2 hrs
subsequent efforts to view disk manager or volumes in server manager causes a reboot
searches through google suggest DISKPART> SAN=OnlineAll but I cannot get DISKPART to do anything any then the server reboots. I have started to roll back last windows updates, removing software that has storage type drivers like arcserve, Sophos exlusions are ok.
node b cannot complete Cluster Validation in fact the last time I ran it the server unexpectedly rebooted....
any clues on how to resolve?