.\" Copyright (c) 1980 Regents of the University of California.
.\" All rights reserved. The Berkeley software License Agreement
.\" specifies the terms and conditions for redistribution.
.\" @(#)ht.4 6.2 (Berkeley) 6/1/86
ht \- TM-03/TE-16,TU-45,TU-77 MASSBUS magtape interface
.B "master ht0 at mba? drive ?"
.B "tape tu0 at ht0 slave 0"
The tm-03/transport combination provides a standard tape drive
interface as described in
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.
\fBtu%d: no write ring\fR. 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.
\fBtu%d: not online\fR. 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.
\fBtu%d: can't change density in mid-tape\fR. 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
\fBtu%d: hard error bn%d mbsr=%b er=%b ds=%b\fR. A tape error occurred
at block \fIbn\fR; 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.
If any non-data error is encountered on non-raw tape, it refuses to do anything