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User Commands mt(1)
NAME
mt - magnetic tape control
SYNOPSIS
mt [-f tapename] command... [count]
DESCRIPTION
The mt utility sends commands to a magnetic tape drive. If
-f tapename is not specified, the environment variable TAPE
is used. If TAPE does not exist, mt uses the device
/dev/rmt/0n.
OPTIONS
The following option is supported:
-f tapename Specifies the raw tape device.
OPERANDS
The following operands are supported:
count The number of times that the requested
operation is to be performed. By default, mt
performs command once. Multiple operations
of command may be performed by specifying
count.
command Available commands that can be sent to a
magnetic tape drive. Only as many characters
as are required to uniquely identify a com-
mand need be specified.
eof Writes count EOF marks at
weof the current position on the
tape.
fsf Forward spaces over count
EOF marks. The tape is posi-
tioned on the first block of
the file.
SunOS 5.10 Last change: 1 Sep 2004 1
User Commands mt(1)
fsr Forward spaces count
records.
bsf Back spaces over count EOF
marks. The tape is posi-
tioned on the beginning-of-
tape side of the EOF mark.
bsr Back spaces count records.
nbsf Back spaces count files. The
tape is positioned on the
first block of the file.
This is equivalent to
count+1 bsf's followed by
one fsf.
asf Specifies absolute space to
count file number. This is
equivalent to a rewind fol-
lowed by a fsf count.
If count is specified with any of the fol-
lowing commands, the count is ignored and
the command is performed only once.
eom Spaces to the end of
recorded media on the tape.
This is useful for appending
files onto previously writ-
ten tapes.
rewind Rewinds the tape.
offline Rewinds the tape and, if
rewoffl appropriate, takes the drive
unit off-line by unloading
the tape.
SunOS 5.10 Last change: 1 Sep 2004 2
User Commands mt(1)
status Prints status information
about the tape unit.
retension Rewinds the cartridge tape
completely, then winds it
forward to the end of the
reel and back to beginning-
of-tape to smooth out tape
tension.
reserve Allows the tape drive to
remain reserved after clos-
ing the device. The drive
must then be explicitly
released.
release Re-establishes the default
behavior of releasing at
close.
forcereserve Breaks the reservation of
the tape drive held by
another host and then
reserves the tape drive.
This command can be executed
only with super-user
privileges.
erase Erases the entire tape. Cau-
tion: Some tape drives have
option settings where only
portions of the tape may be
erased. Be sure to select
the correct setting to erase
the whole tape. Erasing a
tape may take a long time
depending on the device
and/or tape. Refer to the
device specific manual for
time details.
SunOS 5.10 Last change: 1 Sep 2004 3
User Commands mt(1)
config Reads the drives current
configuration from the
driver and displays it in
st.conf format. See st(7D)
for definition of fields and
there meanings.
EXIT STATUS
0 All operations were successful.
1 Command was unrecognized or mt was unable to open
the specified tape drive.
2 An operation failed.
FILES
/dev/rmt/* magnetic tape interface
ATTRIBUTES
See attributes(5) for descriptions of the following attri-
butes:
____________________________________________________________
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
|_____________________________|_____________________________|
| Availability | SUNWcsu |
|_____________________________|_____________________________|
SEE ALSO
tar(1), tcopy(1), ar.h(3HEAD), environ(4), attributes(5),
mtio( 7I), st(7D)
BUGS
Not all devices support all options. Some options are
hardware-dependent. Refer to the corresponding device manual
page.
mt is architecture sensitive. Heterogeneous operation (that
is, SPARC to x86 or the reverse) is not supported.
SunOS 5.10 Last change: 1 Sep 2004 4
Man(1) output converted with
man2html and wrapped by fishsponge
This page was generated on Wed Sep 12 21:37:08 GMT 2007
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