I have a 2012 host running Hyper-V. There are 3 guest VMs all running Server 2012. One of them has started experiencing a problem where it will lock up with the only way to get at it is to do a Turn Off in Hyper-V Manager.
The problem always occurred during the nightly backups. Windows Server Backup is used and the destination is a VHDX file located on a removable cartridge on the host server. This is the same setup for all 3 VMs. The other two do not have any problem with this and this one has operated for about a year without a problem with this. I can do a one time backup using the same parameters as the scheduled backup and they all complete successfully with no lockup of the server.
I finally deleted the VHDX file and created a new one. I also deleted the backup job and created a new one. Backups ran fine for just over a week, then the lockups of the server started again.
The only seemingly consistent evidence I can find is 153 Disk warnings in the System log. These seem to occur during the backup process. My research indicates some sort of disk system problem.
Any ideas?
Jonathan