One of our 2016 servers has just started to fail during backups - others are backing up to the same NAS without any problems
It creates the shadow copy, backs up the EFI partition, moves on to backing up the C: drive and then fails with The backup operation that started at '2017-12-18T02:00:47.505464600Z' has failed with following error code '0x807800C5' (There was a failure in preparing the backup image of one of the volumes in the backup set.). Please review the event details for a solution, and then rerun the backup operation once the issue is resolved.
I changed WindowsImageBackup to a different name. It created the directory again but still fails at the same point.
This Saturday (after patch Tuesday) it was rebooted, but still the same. At a loss with this one!
There is plenty of available space at the NAS in relation to the hard drive being backed up
Thank you
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