1.\" Copyright (c) 1985, 1990, 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. Neither the name of the University nor the names of its contributors 13.\" may be used to endorse or promote products derived from this software 14.\" without specific prior written permission. 15.\" 16.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 17.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 20.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26.\" SUCH DAMAGE. 27.\" 28.\" @(#)tcopy.1 8.2 (Berkeley) 4/17/94 29.\" $FreeBSD: src/usr.bin/tcopy/tcopy.1,v 1.7.2.5 2003/02/24 23:04:39 trhodes Exp $ 30.\" $DragonFly: src/usr.bin/tcopy/tcopy.1,v 1.2 2003/06/17 04:29:32 dillon Exp $ 31.\" 32.Dd April 17, 1994 33.Dt TCOPY 1 34.Os 35.Sh NAME 36.Nm tcopy 37.Nd copy and/or verify mag tapes 38.Sh SYNOPSIS 39.Nm 40.Op Fl cvx 41.Op Fl s Ar maxblk 42.Oo Ar src Op Ar dest 43.Oc 44.Sh DESCRIPTION 45The 46.Nm 47utility is designed to copy magnetic tapes. The only assumption made 48about the tape is that there are two tape marks at the end. 49The 50.Nm 51utility with only a source tape 52.Pf ( Ar /dev/rsa0 53by default) specified will print 54information about the sizes of records and tape files. If a destination 55is specified a copy will be made of the source tape. The blocking on the 56destination tape will be identical to that used on the source tape. Copying 57a tape will yield the same output as if just printing the sizes. 58.Pp 59Options: 60.Bl -tag -width s_maxblk 61.It Fl c 62Copy 63.Ar src 64to 65.Ar dest 66and then verify that the two tapes are identical. 67.It Fl s Ar maxblk 68Specify a maximum block size, 69.Ar maxblk . 70.It Fl v 71Given the two tapes, 72.Ar src 73and 74.Ar dest 75verify that they are identical. 76.It Fl x 77Output all informational messages to the standard error. 78This option is useful when 79.Ar dest 80is 81.Pa /dev/stdout . 82.El 83.Sh SEE ALSO 84.Xr mtio 4 85.Sh HISTORY 86The 87.Nm 88command appeared in 89.Bx 4.3 . 90.Sh BUGS 91.Bl -item 92.It 93Writing an image of a tape to a file does not preserve much more than 94the raw data. 95Block size(s) and tape EOF marks are lost which would 96otherwise be preserved in a tape-to-tape copy. 97.It 98EOD is determined by two sequential EOF marks with no data between. 99There are old systems which typically wrote three EOF's between tape 100files. 101.Nm 102will erroneously stop copying early in this case. 103.It 104When using the copy/verify option \-c 105.Nm 106does not rewind the tapes prior to start. 107A rewind is performed 108after writing prior to the verification stage. 109If one doesn't start 110at BOT then the comparison may not be of the intended data. 111.El 112