SSR Backups constantly fail
I am running SSR2013 on a Windows2012R2 server trying to back up the two local drives to a NAS device with a shadow copy to a USB drive but it costantly fails with the following:
--Unable to write to file.
---Error EBAB03F1: Following Operating System error occurred while performing requested operation: 'An unexpected network error occurred.'
---Unable to set file size.
----Error EBAB03F1: Following Operating System error occurred while performing requested operation: 'An unexpected network error occurred.'
(UMI:V-281-2001-31)
I have checked the following:
There is enough hard drive space on the NAS
All of the permissions are correct
There are no obviously associated event log entries
The job starts and creates three ".tmp" files for the bakup of C: and up to 4 ".tmp" file for X: and then it fails. There were about 21 ".tmp" files for the X: drive the one and only time it worked and the system is set to split the files at 9.4GB in size.
The server is hosting two Hyper-V guests and the VHDX files are on the X: drive.
The annoying thing is that the backup worked once last week (running a base backup) and then we had two differentials as well but this week absolutely nothing will work. I have set it up to create a new base backup each week with Diffs every other day (mon-fri)
If anyone has any ideas please let me know.