109 lines
4.0 KiB
Groff
109 lines
4.0 KiB
Groff
.\" Copyright (c) 1983, 1991 Regents of the University of California.
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.\" All rights reserved.
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.\"
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.\" Redistribution and use in source and binary forms, with or without
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.\" modification, are permitted provided that the following conditions
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.\" are met:
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.\" 1. Redistributions of source code must retain the above copyright
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.\" notice, this list of conditions and the following disclaimer.
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.\" 2. Redistributions in binary form must reproduce the above copyright
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.\" notice, this list of conditions and the following disclaimer in the
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.\" documentation and/or other materials provided with the distribution.
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.\" 3. All advertising materials mentioning features or use of this software
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.\" must display the following acknowledgement:
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.\" This product includes software developed by the University of
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.\" California, Berkeley and its contributors.
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.\" 4. Neither the name of the University nor the names of its contributors
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.\" may be used to endorse or promote products derived from this software
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.\" without specific prior written permission.
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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.\" SUCH DAMAGE.
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.\"
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.\" from: @(#)ut.4 6.2 (Berkeley) 3/27/91
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.\" $Id: ut.4,v 1.2 1993/08/01 07:35:54 mycroft Exp $
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.\"
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.Dd March 27, 1991
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.Dt UT 4 vax
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.Os BSD 4.2
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.Sh NAME
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.Nm ut
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.Nd
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.Tn UNIBUS TU45
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tri-density tape drive interface
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.Sh SYNOPSIS
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.Cd "controller ut0 at uba0 csr 0172440 vector utintr"
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.Cd "tape tj0 at ut0 drive 0"
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.Sh DESCRIPTION
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The
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.Nm ut
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interface provides access to a standard tape drive interface as
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describe in
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.Xr mtio 4 .
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Hardware implementing this on the
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.Tn VAX
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is typified by the System
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Industries
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.Tn SI
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9700 tape subsystem. Tapes may be read or written
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at 800, 1600, and 6250
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.Tn BPI .
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.Sh DIAGNOSTICS
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.Bl -diag
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.It tj%d: no write ring.
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An attempt was made to write on the tape drive
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when no write ring was present; this message is written on the terminal of
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the user who tried to access the tape.
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.Pp
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.It tj%d: not online.
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An attempt was made to access the tape while it
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was offline; this message is written on the terminal of the user
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who tried to access the tape.
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.Pp
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.It tj%d: can't change density in mid-tape.
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An attempt was made to write
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on a tape at a different density than is already recorded on the tape.
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This message is written on the terminal of the user who tried to switch
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the density.
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.Pp
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.It "ut%d: soft error bn%d cs1=%b er=%b cs2=%b ds=%b."
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The formatter indicated a corrected error at a density other
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than 800bpi. The data transferred is assumed to be correct.
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.Pp
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.It "ut%d: hard error bn%d cs1=%b er=%b cs2=%b ds=%b."
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A tape error occurred
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at block
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.Pp
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.It bn.
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Any error is
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fatal on non-raw tape; when possible the driver will have retried
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the operation which failed several times before reporting the error.
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.Pp
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.It tj%d: lost interrupt.
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A tape operation did not complete
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within a reasonable time, most likely because the tape was taken
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off-line during rewind or lost vacuum. The controller should, but does not,
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give an interrupt in these cases. The device will be made available
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again after this message, but any current open reference to the device
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will return an error as the operation in progress aborts.
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.El
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.Sh SEE ALSO
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.Xr mt 1 ,
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.Xr mtio 4
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.Sh HISTORY
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The
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.Nm
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driver appeared in
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.Bx 4.2 .
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.Sh BUGS
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May hang if a physical error (non-data) occurs.
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