unixdev.net


Switch to SpeakEasy.net DSL

The Modular Manual Browser

Home Page
Manual: (4.4BSD-Lite2)
Page:
Section:
Apropos / Subsearch:
optional field

MT(1)                        BSD Reference Manual                        MT(1)

NAME
     mt - magnetic tape manipulating program

SYNOPSIS
     mt [-f tapename] command [count]

DESCRIPTION
     Mt is used to give commands to a magnetic tape drive.  By default mt per-
     forms the requested operation once.  Operations may be performed multiple
     times by specifying count. Note that tapename must reference a raw (not
     block) tape device.

     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 ig-
                nored).

     status     Print status information about the tape unit.

     If a tape name is not specified, and the environment variable TAPE does
     not exist; mt uses the device /dev/rmt12.

     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
                 tapename is not given.

FILES
     /dev/rmt*  Raw magnetic tape interface

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

HISTORY
     The mt command appeared in 4.3BSD.

4th Berkeley Distribution        June 6, 1993                                1