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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 $
41 .Nd copy and/or verify mag tapes
51 utility is designed to copy magnetic tapes. The only assumption made
52 about the tape is that there are two tape marks at the end.
55 utility with only a source tape
57 by default) specified will print
58 information about the sizes of records and tape files. If a destination
59 is specified a copy will be made of the source tape. The blocking on the
60 destination tape will be identical to that used on the source tape. Copying
61 a tape will yield the same output as if just printing the sizes.
64 .Bl -tag -width s_maxblk
70 and then verify that the two tapes are identical.
72 Specify a maximum block size,
79 verify that they are identical.
81 Output all informational messages to the standard error.
82 This option is useful when
97 Writing an image of a tape to a file does not preserve much more than
99 Block size(s) and tape EOF marks are lost which would
100 otherwise be preserved in a tape-to-tape copy.
102 EOD is determined by two sequential EOF marks with no data between.
103 There are old systems which typically wrote three EOF's between tape
106 will erroneously stop copying early in this case.
108 When using the copy/verify option \-c
110 does not rewind the tapes prior to start.
111 A rewind is performed
112 after writing prior to the verification stage.
114 at BOT then the comparison may not be of the intended data.