mt(1)                                                       mt(1)



     NAME
          mt - magnetic tape manipulating program

     SYNOPSIS
          mt [-fdevice-file] command [count]

     DESCRIPTION
          mt is used to give commands to a magnetic tape drive.  If
          device-file is not specified using the -f flag option, the
          environment variable TAPE is used; if TAPE does not exist,
          mt uses the device /dev/rmt12.  Note that special-file must
          reference a raw (not block) tape device.  By default, mt
          performs command once.  command may be performed more than
          once by supplying a count.

          command may be any one of the following set of commands.
          Only as many characters as are required to uniquely identify
          a command within the set need be specified.

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

          fsf       Forward space count files.

          fsr       Forward space count records.

          bsf       Backspace count files.

          bsr       Backspace count records.

          rewind    Rewind the tape (count is ignored).

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

          format    Format a tape cartridge (count is ignored).  This
                    only applies to /dev/rmt/tcx[n] device files that
                    represent the Apple SC 40 Tape Backup.

          status    Print status information about the tape unit.

          mt returns a 0 exit status when count invocations of command
          are successful, 1 if command was unrecognized, and 2 if any
          invocation of command failed.

     FILES
          /dev/rmt/*

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




     April, 1990                                                     1