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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).
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)
FreeBSD Sources for mt(1)
OpenBSD sources for mt(1)
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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