PROBLEM: (cfs.91538) (PATCH ID: OSF540-129)
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This patch allows manual shared access coordination of open SAN accessable
tape devices.  The mt command has been enhanced to allow for tape devices
to be reserved (via the scsi-2 reserve command) and released (via the scsi-2
release command).  The new commands are:
mt reserve
mt release
mt tur

Reserve also includes modifiers:
 -t (force a target reset only on the active path before the reserve)
 -f (force a target reset on all available paths before the reserve)
 -l (force a lun reset only on the active path before the reserve)
 -r (force a lun reset on all available paths before the reserve)

This command (mt reserve) should be used prior to the use of an application
that is not shared tape aware.  After completion, this command should be used
again (mt release).  The mt tur command can be used to determine if another
application has already reserve the tape.  The force options above should only
be used when it is known that the device is NOT being used by another user
and that user simply forgot to release the device after they had finished; any
other use of the force options can lead to possible data corruption by allowing
multiple users to access the device at the same time.