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MT(1)											    MT(1)

       mt - magnetic tape manipulating program

       mt [ -f tapename ] command [ count ]

       Mt  is  used  to give commands to a magnetic tape drive.  If a tape name is not specified,
       the environment variable TAPE is used;  if  TAPE  does  not  exist,  mt	uses  the  device
       /dev/rmt12.   Note that tapename must reference a raw (not block) tape device.  By default
       mt performs the requested operation once.  Operations may be performed multiple	times  by
       specifying count.

       The  available  commands  are  listed  below.   Only as many characters as are required to
       uniquely identify a command need be specified.

       eof, weof
	      Write count end-of-file marks at the current position on the tape.

       fsf    Forward space count files.

       fsr    Forward space count records.

       bsf    Back space count files.

       bsr    Back space count records.

       rewind Rewind the tape (Count is ignored).

       offline, rewoffl
	      Rewind the tape and place the tape unit off-line (Count is ignored).

       status Print status information about the tape unit.

	      Enable the readahead/writebehind cache on the tape unit.

	      Turn off the readahead/writebehind cache on the tape unit.

       Mt returns a 0 exit status when the operation(s) were successful, 1  if	the  command  was
       unrecognized, and 2 if an operation failed.

       The  cacheon  and cacheoff commands currently only apply to the TMSCP driver and then only
       for certain drives such as the TU81+.  No error is produced by the  TMSCP  driver  if  the
       cache commands are used.  Other drivers will return an error code since they do not recog-
       nize the MTCACHE and MTNOCACHE functions codes.	See mtio(4).

       /dev/rmt* Raw magnetic tape interface

       mtio(4), tmscp(4), dd(1), ioctl(2), environ(7)

4th Berkeley Distribution		December 22, 1995				    MT(1)
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