On 11/01/17 05:16, Charles wrote:
>
> According to both the man pages and experimentation, Debian Jessie's
> mt and mtx do not support an unlock command. 

Whilst other debian versions do

# mt --version
mt-st v. 1.3
default tape device: '/dev/tape'


      lock   (SCSI tapes) Lock the tape drive door.

       unlock (SCSI tapes) Unlock the tape drive door.


You might want to check the version of MT you have installed.


(mt -f /dev/nst0 lock)

Note that lock/unlock will _only_ work if there's a tape in the drive.





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