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MT(1)			     BSD Reference Manual			 MT(1)

NAME
     mt, eject - magnetic tape and removable media manipulating program

SYNOPSIS
     mt [-f device] command [count]
     eject [-t] device

DESCRIPTION
     The mt utility sends commands to a magnetic tape drive. By default, mt
     performs the requested operation once. Operations may be performed multi-
     ple times by specifying count. Note that device must reference a raw (not
     block) tape device. If device is of the form "host:device" or
     "user@host:device", mt writes to the named tape device on the remote host
     using rmt(8). eject is simply an alias for mt, with the offline command
     specified. eject may also be used to eject other types of removable
     media.

     The options for mt are as follows:

     -f device
	     Operate on the device specified.

     The options for eject are as follows:

     -t	     Insert the device instead of ejecting. For the cd(4) driver, this
	     requests that the tray be closed.

     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). On non-tape removable media, the offline command
		causes the media to be ejected when the last operation on it
		closes (i.e., the filesystem is unmounted).

     status	Print status information about the tape unit.

     retension	Retension the tape (if this operation is supported by the tape
		unit).

     erase	Erase the tape (if this operation is supported by the tape
		unit).

     eom	Forward space to the end of the media.

     blocksize	Set the tape blocksize to count bytes.

     density	Set the tape density code to count as specified in the SCSI2
		specification.

     If a tape name is not specified, and the environment variable TAPE does
     not exist, mt uses the device /dev/rst0. The TAPE variable is ignored by
     eject.

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

ENVIRONMENT
     If the following environment variable exists, it is utilized by mt.

     TAPE	 mt checks the TAPE environment variable if the argument
		 device is not given.

FILES
     /dev/rst*			    raw SCSI tape interface
     /dev/rmt*			    raw magnetic tape interface
     /usr/src/sys/scsi/scsi_tape.h  list of SCSI2 density codes

EXAMPLES
	   $ eject /dev/rcd0c

     Eject the first CD device. This will work even if there is no CD in the
     drive.

SEE ALSO
     dd(1), ioctl(2), mtio(4), environ(7)

HISTORY
     The mt utility appeared in Version 2 AT&T UNIX.

MirOS BSD #10-current		June 12, 1996				     1
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