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. 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.\" @(#)tcopy.1 8.2 (Berkeley) 4/17/94 33.\" $FreeBSD: src/usr.bin/tcopy/tcopy.1,v 1.7.2.5 2003/02/24 23:04:39 trhodes Exp $ 34.\" $DragonFly: src/usr.bin/tcopy/tcopy.1,v 1.2 2003/06/17 04:29:32 dillon Exp $ 35.\" 36.Dd April 17, 1994 37.Dt TCOPY 1 38.Os 39.Sh NAME 40.Nm tcopy 41.Nd copy and/or verify mag tapes 42.Sh SYNOPSIS 43.Nm 44.Op Fl cvx 45.Op Fl s Ar maxblk 46.Oo Ar src Op Ar dest 47.Oc 48.Sh DESCRIPTION 49The 50.Nm 51utility is designed to copy magnetic tapes. The only assumption made 52about the tape is that there are two tape marks at the end. 53The 54.Nm 55utility with only a source tape 56.Pf ( Ar /dev/rsa0 57by default) specified will print 58information about the sizes of records and tape files. If a destination 59is specified a copy will be made of the source tape. The blocking on the 60destination tape will be identical to that used on the source tape. Copying 61a tape will yield the same output as if just printing the sizes. 62.Pp 63Options: 64.Bl -tag -width s_maxblk 65.It Fl c 66Copy 67.Ar src 68to 69.Ar dest 70and then verify that the two tapes are identical. 71.It Fl s Ar maxblk 72Specify a maximum block size, 73.Ar maxblk . 74.It Fl v 75Given the two tapes, 76.Ar src 77and 78.Ar dest 79verify that they are identical. 80.It Fl x 81Output all informational messages to the standard error. 82This option is useful when 83.Ar dest 84is 85.Pa /dev/stdout . 86.El 87.Sh SEE ALSO 88.Xr mtio 4 89.Sh HISTORY 90The 91.Nm 92command appeared in 93.Bx 4.3 . 94.Sh BUGS 95.Bl -item 96.It 97Writing an image of a tape to a file does not preserve much more than 98the raw data. 99Block size(s) and tape EOF marks are lost which would 100otherwise be preserved in a tape-to-tape copy. 101.It 102EOD is determined by two sequential EOF marks with no data between. 103There are old systems which typically wrote three EOF's between tape 104files. 105.Nm 106will erroneously stop copying early in this case. 107.It 108When using the copy/verify option \-c 109.Nm 110does not rewind the tapes prior to start. 111A rewind is performed 112after writing prior to the verification stage. 113If one doesn't start 114at BOT then the comparison may not be of the intended data. 115.El 116