I am using Windows Server Backup on my Small Business Server 2008. My backup is failing with the following error code: 2155348010. I see the warning message that the target is running low on free space in the event viewer. I checked Disk Management and see there is 465GB with only 19MB free. I am backing up our server's C: drive and the Exchange files. I know I need to have an extra 12-13% as free space for the backups to run properly.
I found directions to delete the oldest backup from http://social.technet.microsoft.com/Forums/en-US/windowsbackup/thread/62488e7a-4638-430c-950c-e75ac42b0fa3
However, I get the message that "No system state backups were found - only full volume backups are present." How can I clean up space on my backup drive so I can get an error free backup?
Thank you for your help.