m...@netbsd.org (Emmanuel Dreyfus) writes: >Ad since the MAXPHYS limit also exists on plain tape access (without >LTFS), this means no modern LTO drive can be used at all on NetBSD until >you merge your branch?
The drives should work assuming that you restrict yourself to fixed block sizes <= MAXPHYS or that you use variable block mode. The "HP LTO Ultrium 5 technical manual" suggests that it supports either mode. But it also mentions that is best to use >= 128k in fixed block mode and >= 256k in variable block mode for performance reasons. Anything smaller will be slow and, as Thor said, will waste precious tape.