Copyright (c) 1980 Regents of the University of California.
All rights reserved. The Berkeley software License Agreement
specifies the terms and conditions for redistribution.

@(#)mt.1 6.2 (Berkeley) 05/09/86

C 4 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.

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

/dev/rmt* Raw magnetic tape interface mtio(4), dd(1), ioctl(2), environ(7)