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.\" 34.Dd April 17, 1994 35.Dt TCOPY 1 36.Os BSD 4.3 37.Sh NAME 38.Nm tcopy 39.Nd copy and/or verify mag tapes 40.Sh SYNOPSIS 41.Nm 42.Op Fl cvx 43.Op Fl s Ar maxblk 44.Oo Ar src Op Ar dest 45.Oc 46.Sh DESCRIPTION 47.Nm Tcopy 48is designed to copy magnetic tapes. The only assumption made 49about the tape is that there are two tape marks at the end. 50.Nm Tcopy 51with 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 91Writting an image of a tape to a file does not preserve much more than 92the raw data. Block size(s) and tape EOF marks are lost which would 93otherwise be preserved in a tape-to-tape copy. 94 95EOD is determined by two sequential EOF marks with no data between. 96There are old systems which typically wrote three EOF's between tape 97files. 98.Xr tcopy 1 99will erroneously stop copying early in this case. 100 101When using the copy/verify option \-c 102.Xr tcopy 1 103does not rewind the tapes prior to start. A rewind is performed 104after writing prior to the verification stage. If one doesn't start 105at BOT then the comparison may not be of the intended data. 106