How did you solve the problem with
mt -f /dev/st0 status
i get this
/dev/st0: Device or resource busy
Are you running it as root? Is the tape drive doing something when
you try to run the command? Remember, most tape drives do a bunch of
stuff when you insert a tape, so it may take a while before you can
access the drive.
Do not meddle in the affairs of dragons,
for thou art crunchy and taste good with Ketchup!