MT(1) | General Commands Manual | MT(1) |
mt
, eject
—
magnetic tape and removable media manipulating
program
mt |
[-f device]
command [count] |
eject |
[-t ] device |
The mt
utility sends commands to a
magnetic tape drive. By default, mt
performs the
requested operation once. Operations may be performed multiple times by
specifying count. Note that
device must reference a raw (not block) tape device.
If device is of the form “host:device”
or “user@host:device”, mt
writes to
the named tape device on the remote host using
rmt(8). eject
is
simply an alias for mt
, with the
offline
command specified.
eject
may also be used to eject other types of
removable media.
The options for mt
are as follows:
-f
deviceThe options for eject
are as follows:
-t
The available commands are listed below. Only as many characters as are required to uniquely identify a command need be specified.
eof
,
weof
fsf
fsr
bsf
bsr
rewind
is
ignored
).offline
,
rewoffl
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
retension
erase
eom
blocksize
density
If a tape name is not specified, and the environment variable
TAPE
does not exist, mt
uses
the device /dev/rst0. The
TAPE
variable is ignored by
eject
.
If the following environment variable exists, it is utilized by
mt
.
TAPE
mt
checks the TAPE
environment variable if the argument device is not
given.mt
returns a 0 exit status when the
operation(s) were successful, 1 if the command was unrecognized, and 2 if an
operation failed.
Eject the first CD device. This will work even if there is no CD in the drive:
$ eject /dev/rcd0c
The mt
utility appeared in
Version 2 AT&T UNIX.
January 16, 2020 | OpenBSD-current |