Have a 2008 R2 SP1 Server, patched to the current state, and we can not perform a system state / BMR backup. The backup starts, VSS creation always succeeds, but between 30 and 80% (it's never at the same point) the backup fails with event 5, error 2147943567.
The eventlog message says the the problem should be in the "Details message":
I can not see the reason for the failure in the eventlog message above.
In Windows Server Backup, the logged error message is "a device is not connected".
The server is running on VMware and has just one virtual hard disk (drive C:) All other servers running on the same VMware plattform don't have this problem. Also, there are no warnings or errors in the system and application eventlog of the affected server. Have also tried to run a backup with completely disabled Antivirus scanner, but the backup stops with the same error.
What can we do? Thank you all in advance for any advice.
Franz