Not worthwhile to buy LTO-6 tapes for differential backups
We have a tape drive that is configured to use LTO-6 tapes, which we need to use for our substantial weekly back-ups.
We also run daily differential back-ups that would easily fit on one LTO-4 tape each. We have a bunch of these lying around that we would love to use as opposed to sinking money ($100/ea) into LTO-6 tapes when we're not using them to anywhere near their full capacity.
But apparently, LTO-4 tapes are only read-only when put in a drive configured for LTO-6!
We are hoping for an alternative to just buying new LTO-6 tapes. Has anyone else run into this issue and come up with a good solution?