NAME
ht
-
TM-03/ TE-16,
TU-45,
TU-77
MASSBUS
mag tape device interface:
SYNOPSIS
ht0 at mba? drive ?
tu0 at ht0 slave 0
DESCRIPTION
NOTE: This driver has not been ported from
4.4BSD
yet.
The
TM-03
transport combination provides a standard tape drive
interface as described in
mtio(4).
All drives provide both 800 and 1600
BPI;
the
TE-16
runs at 45
IPS,
the
TU-45
at 75
IPS,
while the
TU-77
runs at 125
IPS
and autoloads tapes.
DIAGNOSTICS
- tu%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.
- tu%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.
- tu%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.
- tu%d: hard error bn%d mbsr=%b er=%b ds=%b.
-
A tape error occurred
at block
bn;
the ht error register and drive status register are
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.
SEE ALSO
mt(1),
tar(1),
mt(4),
mtio(4),
physio(4),
tm(4),
ts(4),
ut(4)
HISTORY
An
ht
driver appeared in
Version 6 AT&T UNIX
.
BUGS
May hang if physical (non-data) errors occur.