This seems to be a problem that has come up before in these forums - I have been through several threads and none of the suggestions have helped fix server backup.
I am trying to perform a System State and C: backup (for Bare Metal Recovery) - backup is to a local drive (so not a NAS or a Network Share). Server Backup used to work but stopped sometime around the time I switched the backup drive (which was running out of space).
Backup fails both from the scheduled Server Essentials Dashboard and also manually using wbadmin. For example:
wbadmin start backup -backuptarget:P: -include:c: -allcritical -vssfull -quiet > "c:\Temp\Server Backup.log"
Gives the following output:
(C) Copyright 2013 Microsoft Corporation. All rights reserved.
Retrieving volume information...
This will back up System Reserved (350.00 MB),System(C:) to P:.
The backup operation to P: is starting.
Creating a shadow copy of the volumes specified for backup...
Creating a shadow copy of the volumes specified for backup...
Creating a shadow copy of the volumes specified for backup...
Creating a shadow copy of the volumes specified for backup...
Creating a shadow copy of the volumes specified for backup...
Creating a shadow copy of the volumes specified for backup...
Creating a shadow copy of the volumes specified for backup...
Creating a shadow copy of the volumes specified for backup...
Creating a shadow copy of the volumes specified for backup...
Creating a shadow copy of the volumes specified for backup...
Creating a shadow copy of the volumes specified for backup...
Windows Server Backup is updating the existing backup to remove files that have
been deleted from your server since the last backup.
This might take a few minutes.
Windows Server Backup is updating the existing backup to remove files that have
been deleted from your server since the last backup.
This might take a few minutes.
Windows Server Backup is updating the existing backup to remove files that have
been deleted from your server since the last backup.
This might take a few minutes.
Windows Server Backup is updating the existing backup to remove files that have
been deleted from your server since the last backup.
This might take a few minutes.
The backup of volume System Reserved (350.00 MB) could not be completed. Error: The specified backup disk cannot be found.
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The Backup Error log file has the following:
Backup of volume \\?\Volume{c05750d2-1c50-11e3-80b1-806e6f6e6963}\ has failed. The specified backup disk cannot be found.
I think underlying this is a VSS problem but I can't spot anything amiss using vssadmin. (vssadmin list writers shows 'No Errors' against each entry).
Looking at the Event Log, there are no entries shown against VSS (as Source) under Backup (as Source), the following error is shown:
The backup operation that started at '2015-08-23T00:30:21.834712600Z' 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'm stumped - I've spent 3 or 4 days trying to crack this and am no further forward. Any help or suggestions would be really appreciated.
