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.\" 4. 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.\" $FreeBSD$ 30.\" 31.Dd December 20, 2006 32.Dt TCOPY 1 33.Os 34.Sh NAME 35.Nm tcopy 36.Nd copy and/or verify mag tapes 37.Sh SYNOPSIS 38.Nm 39.Op Fl cvx 40.Op Fl s Ar maxblk 41.Oo Ar src Op Ar dest 42.Oc 43.Sh DESCRIPTION 44The 45.Nm 46utility is designed to copy magnetic tapes. 47The only assumption made 48about the tape layout is that there are two sequential EOF marks 49at the end. 50By default, the 51.Nm 52utility will print 53information about the sizes of records and files found 54on the 55.Pa /dev/sa0 56tape, or on the tape specified by the 57.Ar src 58argument. 59If a destination tape is also specified by the 60.Ar dest 61argument, a copy of the source tape will be made. 62The blocking on the 63destination tape will be identical to that used on the source tape. 64Copying 65a tape will yield the same program output as if just printing the sizes. 66.Pp 67The following options are available: 68.Bl -tag -width ".Fl s Ar maxblk" 69.It Fl c 70Copy 71.Ar src 72to 73.Ar dest 74and then verify that the two tapes are identical. 75.It Fl s Ar maxblk 76Specify a maximum block size, 77.Ar maxblk . 78.It Fl v 79Given the two tapes 80.Ar src 81and 82.Ar dest , 83verify that they are identical. 84.It Fl x 85Output all informational messages to the standard error 86instead of the standard output. 87This option is useful when 88.Ar dest 89is given as 90.Pa /dev/stdout . 91.El 92.Sh SEE ALSO 93.Xr mt 1 , 94.Xr mtio 4 95.Sh HISTORY 96The 97.Nm 98command appeared in 99.Bx 4.3 . 100.Sh BUGS 101.Bl -item 102.It 103Writing an image of a tape to a file does not preserve much more than 104the raw data. 105Block size(s) and tape EOF marks are lost which would 106otherwise be preserved in a tape-to-tape copy. 107.It 108End of data (EOD) is determined by two sequential EOF marks 109with no data between them. 110There used to be old systems which typically wrote three EOF's between tape 111files. 112The 113.Nm 114utility will erroneously stop copying early in this case. 115.It 116When using the copy/verify option 117.Fl c , 118.Nm 119does not rewind the tapes prior to start. 120A rewind is performed 121after writing, prior to the verification stage. 122If one does not start 123at the beginning-of-tape (BOT) then the comparison 124may not be of the intended data. 125.El 126