1.\" Copyright (c) 1983, 1991, 1993 2.\" The Regents of the University of California. 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.\" @(#)ut.4 8.1 (Berkeley) 6/5/93 33.\" 34.Dd June 5, 1993 35.Dt UT 4 vax 36.Os BSD 4.2 37.Sh NAME 38.Nm ut 39.Nd 40.Tn UNIBUS TU45 41tri-density tape drive interface 42.Sh SYNOPSIS 43.Cd "controller ut0 at uba0 csr 0172440 vector utintr" 44.Cd "tape tj0 at ut0 drive 0" 45.Sh DESCRIPTION 46The 47.Nm ut 48interface provides access to a standard tape drive interface as 49describe in 50.Xr mtio 4 . 51Hardware implementing this on the 52.Tn VAX 53is typified by the System 54Industries 55.Tn SI 569700 tape subsystem. Tapes may be read or written 57at 800, 1600, and 6250 58.Tn BPI . 59.Sh DIAGNOSTICS 60.Bl -diag 61.It tj%d: no write ring. 62An attempt was made to write on the tape drive 63when no write ring was present; this message is written on the terminal of 64the user who tried to access the tape. 65.Pp 66.It tj%d: not online. 67An attempt was made to access the tape while it 68was offline; this message is written on the terminal of the user 69who tried to access the tape. 70.Pp 71.It tj%d: can't change density in mid-tape. 72An attempt was made to write 73on a tape at a different density than is already recorded on the tape. 74This message is written on the terminal of the user who tried to switch 75the density. 76.Pp 77.It "ut%d: soft error bn%d cs1=%b er=%b cs2=%b ds=%b." 78The formatter indicated a corrected error at a density other 79than 800bpi. The data transferred is assumed to be correct. 80.Pp 81.It "ut%d: hard error bn%d cs1=%b er=%b cs2=%b ds=%b." 82A tape error occurred 83at block 84.Pp 85.It bn. 86Any error is 87fatal on non-raw tape; when possible the driver will have retried 88the operation which failed several times before reporting the error. 89.Pp 90.It tj%d: lost interrupt. 91A tape operation did not complete 92within a reasonable time, most likely because the tape was taken 93off-line during rewind or lost vacuum. The controller should, but does not, 94give an interrupt in these cases. The device will be made available 95again after this message, but any current open reference to the device 96will return an error as the operation in progress aborts. 97.El 98.Sh SEE ALSO 99.Xr mt 1 , 100.Xr mtio 4 101.Sh HISTORY 102The 103.Nm 104driver appeared in 105.Bx 4.2 . 106.Sh BUGS 107May hang if a physical error (non-data) occurs. 108