A few days ago I installed the XenServer 7.1 update. Everything worked including the PHD Virtual Backup 6.5 VM and that night a backup of VMs completed successfully.
The following day, the backup appliance had become unresponsive (CPU #0 @ 100%).
Rebooting the VM doesn't work and doing a forceful reboot of the VM just causes it to boot into the same unresponsive state. The console is also blank.
I have now tried reimporting the appliance from fresh, but upon booting it simply boots into the same unresponsive state. The console is also blank.
Assuming the problem lies with the PHD VBA, which is running Ubuntu 12.04.1 LTS, I have decided to trial the newest version of Unitrends Backup which runs CentOS 6.5. However upon booting this VM, the console is blank but the VM is responsive and I can access it via my web browser. But why no console?
What would cause the console to stop working and is there anything I can do to check? What about the PHD VBA? I haven't rebooted the host yet as I am afraid to do so in case it doesn't boot.
I don't know what to do and would appreciate any feedback.