1.\" Copyright (c) 1980, 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.\" @(#)ht.4 8.1 (Berkeley) 6/5/93 33.\" 34.Dd June 5, 1993 35.Dt HT 4 vax 36.Os BSD 4 37.Sh NAME 38.Nm ht 39.Nd 40.Tn TM-03 Ns / Tn TE-16 , 41.Tn TU-45 , 42.Tn TU-77 43.Tn MASSBUS 44magtape device interface: 45.Sh SYNOPSIS 46.Cd "master ht0 at mba? drive ?" 47.Cd "tape tu0 at ht0 slave 0" 48.Sh DESCRIPTION 49The 50.Tn TM-03 51transport combination provides a standard tape drive 52interface as described in 53.Xr mtio 4 . 54All drives provide both 800 and 1600 55.Tn BPI ; 56the 57.Tn TE-16 58runs at 45 59.Tn IPS , 60the 61.Tn TU-45 62at 75 63.Tn IPS , 64while the 65.Tn TU-77 66runs at 125 67.Tn IPS 68and autoloads tapes. 69.Sh DIAGNOSTICS 70.Bl -diag 71.It tu%d: no write ring. 72An attempt was made to write on the tape drive 73when no write ring was present; this message is written on the terminal of 74the user who tried to access the tape. 75.Pp 76.It tu%d: not online. 77An attempt was made to access the tape while it 78was offline; this message is written on the terminal of the user 79who tried to access the tape. 80.Pp 81.It tu%d: can't change density in mid-tape. 82An attempt was made to write 83on a tape at a different density than is already recorded on the tape. 84This message is written on the terminal of the user who tried to switch 85the density. 86.Pp 87.It "tu%d: hard error bn%d mbsr=%b er=%b ds=%b." 88A tape error occurred 89at block 90.Em bn ; 91the ht error register and drive status register are 92printed in octal with the bits symbolically decoded. Any error is 93fatal on non-raw tape; when possible the driver will have retried 94the operation which failed several times before reporting the error. 95.El 96.Sh SEE ALSO 97.Xr mt 1 , 98.Xr tar 1 , 99.Xr tp 1 , 100.Xr mtio 4 , 101.Xr mt 4 , 102.Xr physio 4 , 103.Xr tm 4 , 104.Xr ts 4 , 105.Xr ut 4 106.Sh HISTORY 107An 108.Nm 109driver appeared in 110.At v6 . 111.Sh BUGS 112May hang if physical (non-data) errors occur. 113