And as I found out the drives are tempermental. I had a tape library and eventually both drives said they'd needed cleaning, even after cleaning. When it worked it was great, though a cheap NAS with a couple of hard drives in it replaced it and was far more reliable and cheaper.

Here i'm seeing the cheapest HDD at a cost of 15€/TB and LTO-9 tape at 4.72€/TB. That's more than a 3x difference.