NAME

mt − magnetic tape manipulating program

SYNOPSIS

mt [ −f tapename ] command [ count ]

DESCRIPTION

Mt is used to give commands to a magnetic tape drive.  If a tape name is not specified, the environment variable TAPE is used;  if TAPE does not exist, mt uses the device /dev/tape. This latter should be set up as required as a symbolic or hard link to the real tape device (/dev/rct∗ by convention).  Note that whatever means is used to specify it, the reference must be to a raw (not block) tape device.  By default mt performs the requested operation once.  Operations may be performed multiple times by specifying count.

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 tape. 

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). 

status
Print status information about the tape unit.

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

FILES

/dev/tapeIndirection to real tape device

SEE ALSO

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

4th Berkeley Distribution  —  Revision 1.5 of 17/09/90