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RocketLink!--> Man page versions: OpenBSD FreeBSD NetBSD RedHat Solaris Others

MT(1)                      OpenBSD Reference Manual                      MT(1)

     mt, eject - magnetic tape and removable media manipulating program

     mt [-f tapename] command [count]
     eject [-f] tapename

     The mt utility sends commands to a magnetic tape drive.  By default, mt
     performs the requested operation once.  Operations may be performed mul-
     tiple times by specifying count. Note that tapename must reference a raw
     (not block) tape device.  If tapename is of the form ``host:tapename'' or
     ``user@host:tapename'', mt writes to the named tape device on the remote
     host using rmt(8).

     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

     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

     erase      Erase the tape (if this operation is supported by the tape

     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

     eject is simply an alias for mt, with the offline command specified.

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

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


     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.

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

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

     The mt utility appeared in 4.3BSD.

OpenBSD 2.6                      June 12, 1996                               2

Source: OpenBSD 2.6 man pages. Copyright: Portions are copyrighted by BERKELEY
SOFTWARE DESIGN, INC., The Regents of the University of California, Massachusetts
Institute of Technology, Free Software Foundation, FreeBSD Inc., and others.

(Corrections, notes, and links courtesy of RocketAware.com)

[Detailed Topics]
FreeBSD Sources for mt(1)
OpenBSD sources for mt(1)

[Overview Topics]

Up to: File System Information - Obtaining information of the filesystem as a whole. Status of disk subsystems, capacity, etc.
Up to: Hardware Access

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