tape_34xx.150bb7 <bus ID of the tape device>: The tape unit does not support tape format 3480-2 XF
Explanation
The tape unit does not support tapes recorded in the 3480-2 XF format.
User response
If you do not need the data recorded on the current tape, rewind the tape
and overwrite it with a supported format. If you need the data on the
current tape, use a tape unit that supports the tape format.