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 mt(1)								       mt(1)




 NAME
      mt - magnetic tape manipulating program

 SYNOPSIS
      mt [-f tapename] command [count]

    Obsolescent
      mt [-t tapename] command [count]

 DESCRIPTION
      mt is used to give commands to the tape drive.  If tapename is not
      specified, the environment variable TAPE is used; if TAPE is not
      defined, the default drive is used.

      mt winds the tape in the requested direction (forward or backward),
      stopping after the specified count EOF marks or records are passed.
      If count is not specified, one is assumed.  Each EOF mark counts as
      one record.  When winding backwards, the tape always stops at the BOT
      marker, regardless of the number remaining in count.

      mt accepts the following commands:

	   eof	     Write count EOF marks.

	   fsf	     Forward space count files.

	   fsr	     Forward space count records.

	   bsf	     Backward space count files.

	   bsr	     Backward space count records.

	   rew	     Rewind tape.

	   offl	     Rewind tape and go offline.

	   eod	     Seek to end of data (DDS and QIC drives only).

	   smk	     Write count setmarks (DDS drives only).

	   fss	     Forward space count setmarks (DDS drives only).

	   bss	     Backward space count setmarks (DDS drives only).

	   status    Print status information about the tape drive.

	   res	     Reserve tape drive for sole use by the host issuing the
		     mt command (stape driver only).

	   rel	     Release tape drive from sole use by the host issuing
		     the mt command (stape driver only).



 Hewlett-Packard Company	    - 1 -   HP-UX Release 11i: November 2000






 mt(1)								       mt(1)




      Spacing operations (back or forward space file or record) leave the
      tape positioned past the object being spaced to in the direction of
      motion.  That is, backspacing a file leaves the the tape positioned
      before the file mark, forward spacing a file leaves the tape
      positioned after the file mark.  This is consistent with all classical
      usage on tapes.

 WARNINGS
      Only raw, no-rewind Berkeley-type devices should be specified.  This
      type of device will not reposition the tape upon close.  An example of
      such a device is /dev/rmt/0mnb.  Please refer to mt(7) for more
      details.

      It is possible to wind the tape beyond the EOT marker and off the end
      of the reel.

      A reservation may only be cleared with a release by the host that
      issued the original reserve. In the event that the host that holds the
      reservation is no longer available, the st command may be used to
      reclaim the device by issuing a bus device reset.	 Refer to st(1M) for
      more details.

      The reserve/release functionality can only be issued to drives using
      the stape driver.

 EXAMPLES
      Rewind the tape associated with the device file /dev/rmt/0mnb:

	   mt -f /dev/rmt/0mnb rew

 FILES
      /dev/rmt/*	  Raw magnetic tape interface
      /dev/rmt/0mnb	  Default tape interface

 AUTHOR
      mt was developed by the University of California, Berkeley.

 SEE ALSO
      dd(1), mt(7), st(1M).















 Hewlett-Packard Company	    - 2 -   HP-UX Release 11i: November 2000