Ejecting a BackUp Tape after it has completed it's backup from an IBM RS/6000

I have an IBM RS/6000 running IBM's AIX 4.2.1 OS.  I need the tape drive to eject the tape after it has completed it's backup.  I'm using AIX's backup software.  The tape drive is an Exabyte 20 Gig, Device name is /dev/rmt0
Backup is currently Cronned.
Here is the current backup command in our Cron:

tar cvSfb 0b /dev/rmt0 20 / | tee -a /usr/lib/mis/pq/CMHCBKUP.list

Ed WalshSenior Director of Applications and Cloud ServicesAsked:
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Try putting this at the end of the script:
  mt -f/dev/rmt0 offline
or, since /dev/rmt0 should be the default for mt, this should work too:
  mt offline

Let me know how you get on.

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