Got a Windows 2012R2 Server (Physical machine) which has been happily backing up to a vault in Azure for a year or more. Back up is for the C: drive which is 500GB. Usually has around 50GB free space, yesterday the free space had dropped to 30GB and the backup job failed with:
"Backup failed because Azure Backup was unable to create a snapshot for the selected backup volume(s) due to insufficient space."
30GB seemed a pretty healthy amount of free space but thought this may have been the cause so I freed up another 60GB of space to take the total free space to 90GB. Yet it's still failing. The error is thus:
C:\ on MyServer.
Backup failed because Azure Backup was unable to create a snapshot for the selected backup volume(s) due to insufficient space.
Make sure that at least 1 GB of free space is available in each of the backed up volumes.
November 11, 2021 9:22 UTC
Given the volume in question (which i understand to be C:) has an awful lot more free space than 1GB, I'm at a bit of a loss to understand what the problem is here.
Can anyone suggest what i need to do to resolve this issue?
Thanks in advance