Ok, ran this update yesterday http://support.microsoft.com/kb/932755 so we'll see if this stops the LSI event errors which might be causing the intermittent problem. Server was rebooted after update.
We've had successful backups since the 4th August (new DLT-S4) until today.
Unfortunately it seems like our problems have not gone away, though I was advised when I returned this morning that all was fine.
It seems that the tape was ejected (Fridays tape) and the person thought the backup had finished and when another inserted (mondays tape) the backup started to run this morning @ 09:00 so I cancelled it.
Once the backup cancel completed, the following error was reported to the log
Error category : Backup Device Errors
Error : e00084ed - A hardware error occurred.
For additional information regarding this error refer to link V-79-57344-34029
