I have my servers set up to do local backups to external hard drives with a goal of 7 to 14 days of backups using command line scripting. Each Sunday the scripts rename the external drive WindowsServerBackukp folder to WindowsServerBackupOld before starting the current day's backup.
On several servers, the backup to the new WindowsServerBackup folder fails. Typically the new WindowsServerBackup folder is only 5Mb to 10Mb. Attempts to rerun the backup fail almost immediately:
This will back up System Reserved (350.00 MB),HRS(H:),DTX(I:),XDR(X:),(C:) to Q:.
The backup operation to Q: is starting.
Creating a shadow copy of the volumes specified for backup...
Creating a shadow copy of the volumes specified for backup...
Creating a backup of volume System Reserved (350.00 MB), copied (0%).
The backup of volume System Reserved (350.00 MB) could not be completed. Error: The specified backup disk cannot be found.
Summary of the backup operation:
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The backup operation stopped before completing.
The backup operation stopped before completing.
Detailed error: The specified backup disk cannot be found.
Log of files successfully backed up:
C:\Windows\Logs\WindowsServerBackup\Backup-20-12-2015_05-50-44.log
Log of files for which backup failed:
C:\Windows\Logs\WindowsServerBackup\Backup_Error-20-12-2015_05-50-44.log
There was a failure in preparing the backup image of one of the volumes in the backup set.
The specified backup disk cannot be found.
Web search indicates that this may be caused by the backup file being corrupted.
No other errors are recorded in event logs. Deleting the WindowsImageBackup folder and rerunning the backup always succeeds.
I would appreciate any thoughts on what may be causing these failures.
Thanks!
Leon