1.\" Copyright (c) 1983, 1991 Regents of the University of California. 2.\" All rights reserved. 3.\" 4.\" Redistribution and use in source and binary forms, with or without 5.\" modification, are permitted provided that the following conditions 6.\" are met: 7.\" 1. Redistributions of source code must retain the above copyright 8.\" notice, this list of conditions and the following disclaimer. 9.\" 2. Redistributions in binary form must reproduce the above copyright 10.\" notice, this list of conditions and the following disclaimer in the 11.\" documentation and/or other materials provided with the distribution. 12.\" 3. All advertising materials mentioning features or use of this software 13.\" must display the following acknowledgement: 14.\" This product includes software developed by the University of 15.\" California, Berkeley and its contributors. 16.\" 4. Neither the name of the University nor the names of its contributors 17.\" may be used to endorse or promote products derived from this software 18.\" without specific prior written permission. 19.\" 20.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 21.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 24.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30.\" SUCH DAMAGE. 31.\" 32.\" from: @(#)ut.4 6.2 (Berkeley) 3/27/91 33.\" $Id: ut.4,v 1.2 1993/08/01 07:35:54 mycroft Exp $ 34.\" 35.Dd March 27, 1991 36.Dt UT 4 vax 37.Os BSD 4.2 38.Sh NAME 39.Nm ut 40.Nd 41.Tn UNIBUS TU45 42tri-density tape drive interface 43.Sh SYNOPSIS 44.Cd "controller ut0 at uba0 csr 0172440 vector utintr" 45.Cd "tape tj0 at ut0 drive 0" 46.Sh DESCRIPTION 47The 48.Nm ut 49interface provides access to a standard tape drive interface as 50describe in 51.Xr mtio 4 . 52Hardware implementing this on the 53.Tn VAX 54is typified by the System 55Industries 56.Tn SI 579700 tape subsystem. Tapes may be read or written 58at 800, 1600, and 6250 59.Tn BPI . 60.Sh DIAGNOSTICS 61.Bl -diag 62.It tj%d: no write ring. 63An attempt was made to write on the tape drive 64when no write ring was present; this message is written on the terminal of 65the user who tried to access the tape. 66.Pp 67.It tj%d: not online. 68An attempt was made to access the tape while it 69was offline; this message is written on the terminal of the user 70who tried to access the tape. 71.Pp 72.It tj%d: can't change density in mid-tape. 73An attempt was made to write 74on a tape at a different density than is already recorded on the tape. 75This message is written on the terminal of the user who tried to switch 76the density. 77.Pp 78.It "ut%d: soft error bn%d cs1=%b er=%b cs2=%b ds=%b." 79The formatter indicated a corrected error at a density other 80than 800bpi. The data transferred is assumed to be correct. 81.Pp 82.It "ut%d: hard error bn%d cs1=%b er=%b cs2=%b ds=%b." 83A tape error occurred 84at block 85.Pp 86.It bn. 87Any error is 88fatal on non-raw tape; when possible the driver will have retried 89the operation which failed several times before reporting the error. 90.Pp 91.It tj%d: lost interrupt. 92A tape operation did not complete 93within a reasonable time, most likely because the tape was taken 94off-line during rewind or lost vacuum. The controller should, but does not, 95give an interrupt in these cases. The device will be made available 96again after this message, but any current open reference to the device 97will return an error as the operation in progress aborts. 98.El 99.Sh SEE ALSO 100.Xr mt 1 , 101.Xr mtio 4 102.Sh HISTORY 103The 104.Nm 105driver appeared in 106.Bx 4.2 . 107.Sh BUGS 108May hang if a physical error (non-data) occurs. 109