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mt(1)									 mt(1)

NAME
       mt - magnetic tape manipulating program

SYNOPSIS
       tapename] command [count]

   Obsolescent
       tapename] command [count]

DESCRIPTION
       is  used to give commands to the tape drive.  If tapename is not speci‐
       fied, the environment variable is used; if is not defined, the  default
       drive is used.

       winds  the tape in the requested direction (forward or backward), stop‐
       ping 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.

       accepts the following commands:

	      Write	count EOF marks.

	      Forward space
			count files.

	      Forward space
			count records.

	      Backward space
			count files.

	      Backward space
			count records.

	      Rewind tape.

	      Rewind tape and go offline.

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

	      Write	count setmarks (DDS drives only).

	      Forward space
			count setmarks (DDS drives only).

	      Backward space
			count setmarks (DDS drives only).

	      Print status information about the tape drive.

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

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

       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 or See 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 command may be used to reclaim
       the device by issuing a bus device reset.  See st(1M) for more details.

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

EXAMPLES
       Rewind  the  tape  associated with the device file or (if legacy DSF is
       disabled):

FILES
       Raw magnetic tape interface (stape)
       Raw magnetic tape interface (estape)
       Default tape interface.
			   If legacy DSF is disabled, the default value is

AUTHOR
       was developed by the University of California, Berkeley.

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

									 mt(1)

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