Hi everyone,
I’m using the Veeam community edition to backup some data to WORM tapes (I have an HP Ultrium LTO-4 1840 tape drive with HP LTO-4 WORM tapes). Unfortunately, I’m getting the following error when the backup job starts: “There is an old MTF block on tape. Cannot write a new one” after which the job fails before backing up any data.

The WORM tapes are all brand new/sealed, so are completely blank and the write-protect toggle/switch on the tapes are all set to off. I created a WORM Media Pool and selected ‘Do not create, always continue using current media set’ for the Media Set.
On first-time insertion, the tapes were inventoried and added to the WORM media pool (Veeam successfully recognizes the tapes as WORM capable) so all looks good.
However I’ve tried 3 brand new tapes so far and they’ve all failed with the same error above, although the same backup job works perfectly on normal RW tapes, so I’m not sure if I need to do anything extra in Veeam to get WORM tapes working?
I’ve run the HP Tape Tools software and confirmed the drive is functioning correctly and firmware is up to date, so I’d be extremely grateful for any advice anyone can offer.
Many thanks in advance.


