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