1.\" Copyright (c) 1980, 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: @(#)ht.4 6.3 (Berkeley) 3/27/91 33.\" $Id: ht.4,v 1.2 1993/08/01 07:36:17 mycroft Exp $ 34.\" 35.Dd March 27, 1991 36.Dt HT 4 vax 37.Os BSD 4 38.Sh NAME 39.Nm ht 40.Nd 41.Tn TM-03 Ns / Tn TE-16 , 42.Tn TU-45 , 43.Tn TU-77 44.Tn MASSBUS 45magtape device interface: 46.Sh SYNOPSIS 47.Cd "master ht0 at mba? drive ?" 48.Cd "tape tu0 at ht0 slave 0" 49.Sh DESCRIPTION 50The 51.Tn TM-03 52transport combination provides a standard tape drive 53interface as described in 54.Xr mtio 4 . 55All drives provide both 800 and 1600 56.Tn BPI ; 57the 58.Tn TE-16 59runs at 45 60.Tn IPS , 61the 62.Tn TU-45 63at 75 64.Tn IPS , 65while the 66.Tn TU-77 67runs at 125 68.Tn IPS 69and autoloads tapes. 70.Sh DIAGNOSTICS 71.Bl -diag 72.It tu%d: no write ring. 73An attempt was made to write on the tape drive 74when no write ring was present; this message is written on the terminal of 75the user who tried to access the tape. 76.Pp 77.It tu%d: not online. 78An attempt was made to access the tape while it 79was offline; this message is written on the terminal of the user 80who tried to access the tape. 81.Pp 82.It tu%d: can't change density in mid-tape. 83An attempt was made to write 84on a tape at a different density than is already recorded on the tape. 85This message is written on the terminal of the user who tried to switch 86the density. 87.Pp 88.It "tu%d: hard error bn%d mbsr=%b er=%b ds=%b." 89A tape error occurred 90at block 91.Em bn ; 92the ht error register and drive status register are 93printed in octal with the bits symbolically decoded. Any error is 94fatal on non-raw tape; when possible the driver will have retried 95the operation which failed several times before reporting the error. 96.El 97.Sh SEE ALSO 98.Xr mt 1 , 99.Xr tar 1 , 100.Xr tp 1 , 101.Xr mtio 4 , 102.Xr mt 4 , 103.Xr physio 4 , 104.Xr tm 4 , 105.Xr ts 4 , 106.Xr ut 4 107.Sh HISTORY 108An 109.Nm 110driver appeared in 111.At v6 . 112.Sh BUGS 113May hang if physical (non-data) errors occur. 114