We have a Dell server running Windows Server 2003 (not SP1). We had a backup job that was backing up around 256GB onto one tape, until there was a problem with the drive (Dell 110T SDLT). Dell shipped a replacement and then the backup job would get to 210GB and alert for a new tape.
I've update the Veritas BackUp Exec software from 9.0 to 9.1, swapped the new Dell 110T with a known working Compaq SDLT320 drive, tried different tapes, tried a couple of things I have found here on the forums and still no joy - it still takes two tapes to backup what was previously on 1 without any data increase.
As an additional note - I have run a test run on teh job and it completes sucessfully.
Thanks for posting the comment on firmware, however we tried getting the latest firmware for it, and that failed.
The Compaq unit that is now sitting on there worked correctly on the server it was previously on, but this issue appears when it is plugged into the current server, which makes me think it might be something to do with Veritas itself...
Thanks for the links Thomas. It certainly looks like an issue with the newer release. I'm going to try changing tonights back-up to use software-only compression to see if that yields favourable results, other than that - it's back to the drawing board!Message was edited by: Jaime Neal
If hardware data compression is used, then the compression is done by the tape drive.
VERITAS Backup Exec (tm) only sends instruction to the tape drive to do compression. If data is not compressing (either because hardware compression on the tape drive is disabled or because the tape drive does not support it),
Also please see the technote:
Backups fail to get double the amount of the native capacity recorded to a media, even when hardware compression is being utilized. http://support.veritas.com/docs/199542
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