Интерактивная система просмотра системных руководств (man-ов)
tcopy (1)
tcopy (1) ( Solaris man: Команды и прикладные программы пользовательского уровня )
>> tcopy (1) ( FreeBSD man: Команды и прикладные программы пользовательского уровня )
BSD mandoc
NAME
tcopy
- copy and/or verify mag tapes
SYNOPSIS
[-cvx
]
[-s maxblk
]
[src [dest
]
]
DESCRIPTION
The
utility is designed to copy magnetic tapes.
The only assumption made
about the tape layout is that there are two sequential EOF marks
at the end.
By default, the
utility will print
information about the sizes of records and files found
on the
/dev/sa0
tape, or on the tape specified by the
src
argument.
If a destination tape is also specified by the
dest
argument, a copy of the source tape will be made.
The blocking on the
destination tape will be identical to that used on the source tape.
Copying
a tape will yield the same program output as if just printing the sizes.
The following options are available:
-c
Copy
src
to
dest
and then verify that the two tapes are identical.
-s maxblk
Specify a maximum block size,
maxblk
-v
Given the two tapes
src
and
dest
verify that they are identical.
-x
Output all informational messages to the standard error
instead of the standard output.
This option is useful when
dest
is given as
/dev/stdout
Writing an image of a tape to a file does not preserve much more than
the raw data.
Block size(s) and tape EOF marks are lost which would
otherwise be preserved in a tape-to-tape copy.
End of data (EOD) is determined by two sequential EOF marks
with no data between them.
There used to be old systems which typically wrote three EOF's between tape
files.
The
utility will erroneously stop copying early in this case.
When using the copy/verify option
-c
does not rewind the tapes prior to start.
A rewind is performed
after writing, prior to the verification stage.
If one does not start
at the beginning-of-tape (BOT) then the comparison
may not be of the intended data.
