RAID only works when the RAID controller doesn't screw up, or critical metadata doesn't get wiped. If the raid controller starts being the problem your data goe

RAID only works when the RAID controller doesn't screw up, or critical metadata doesn't get wiped. If the raid controller starts being the problem your data goes with it. Problem can also happen if your hypervisors filesystem / storage drivers go screwy, get corrupted or one of a million other problems.