TM(4)

NAME
tm - TM-11/TE-10 magtape interface

SYNOPSIS
/sys/conf/SYSTEM:
	# Setting AVIVTM configures the TM driver for the AVIV 800/1600/6250
 	# controller.  For more details, see /sys/pdpuba/tm.c.
	NTM	tm_drives	# TM11
	AVIVTM	YES	# AVIV 800/1600/6250 controller
/etc/dtab:
	#Name	Unit#	Addr	Vector	Br	Handler(s)		# Comments
	tm	?	172520	224	5	tmintr		# tm11 driver
major device number(s):
	raw: 7
	block: 1
minor device encoding:
	bits 0003 specify TS drive
	bit  0004 specifies no-rewind operation
	bits 0030 specify recording density:
		0000:   800BPI
		0010:  1600BPI (AVIVTM and some other controllers)
		0020:  6250BPI (AVIVTM only)

DESCRIPTION
The tm-11/te-10 combination provides a standard tape drive interface as described in mtio(4). The standard DEC tm-11 operates only at 800 bpi. Other controllers of this type may also allow operation at 1600 bpi, under software control or by switching manually.

FILES
/dev/MAKEDEV    script to create special files
/dev/MAKEDEV.local    script to localize special files

SEE ALSO
mt(1), tar(1), tp(1), mtio(4), ht(4), ts(4), mt(4), dtab(5), autoconfig(8)

DIAGNOSTICS
te%d: no write ring. An attempt was made to write on the tape drive when no write ring was present; this message is written on the terminal of the user who tried to access the tape.

te%d: not online. An attempt was made to access the tape while it was offline; this message is written on the terminal of the user who tried to access the tape.

te%d: can't change density in mid-tape. An attempt was made to write on a tape at a different density than is already recorded on the tape. This message is written on the terminal of the user who tried to switch the density.

te%d: hard error bn%d er=%b. A tape error occurred at block bn; the tm error register is printed in octal with the bits symbolically decoded. Any error is fatal on non-raw tape; when possible the driver will have retried the operation which failed several times before reporting the error.

te%d: lost interrupt. A tape operation did not complete within a reasonable time, most likely because the tape was taken off-line during rewind or lost vacuum. The controller should, but does not, give an interrupt in these cases. The device will be made available again after this message, but any current open reference to the device will return an error as the operation in progress aborts.

BUGS
If any non-data error is encountered on non-raw tape, it refuses to do anything more until closed.