Quantum DLT V4 tape backup - Old tapes work, new tapes don't work

For 18 months we have been backing data up to a Quantum DLT V4 tape drive, using Veritas Backup Exec V9.1 software and Quantum DLTtape VS1 media.

Occasionally, we would get a message from the Veritas software that our media was nearing the time when we should replace it.  So, we purchased a bunch of new Quantum DLTtape VS1 cartridges.

We tried using the first set of new media, and every backup would fail with the follwing error message:  "The job failed with the following error: Data error (cyclic redundancy check)."

We returned this first set of new media (thinking perhaps the batch of tapes was just bad), but the replacement media sent by Quantum is yielding the same error.  Yesterday I ran the cleaning cartridge through the tape drive four times, but the nightly backup failed with this error message after 24 minutes and approximately 7GB of data backed up.  I have also tried doing a full erase on the new cartridge, but no luck there either.

The older tapes continue to work just fine.

Any suggestions would be greatly appreciated.
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Well as per the below guide the VS1 tapes are the right ones for the DLTV4 drive.

select Media

Are the old ones also VS1?
tomgodinAuthor Commented:
Yes, the old tapes that work are identical to the new tapes that don't work - both are Quantum DLTtape VS1 cartridges.
makes no sense to, I'll keep working on it but I think it is worth a call to Quantum.

Oh go to their site and get a copy of DTLSage and check for a firmware upgrade.
tomgodinAuthor Commented:
Upgraded tape drives firmware and server driver also.  Backups with new tapes still failed with CRC errors.  Asked by Quantum to purchase a tape from another vendor, which I did, and failure still occurred.  Will receive replacement unit from Quantum.

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