Manipulation DAT tapes on linux
Ilya Palagin
tux-4CS0UopE6WdBDgjK7y7TUQ at public.gmane.org
Wed Nov 17 05:30:49 UTC 2004
JM wrote:
> Hi,
>
> I have a 4mm DDS-150 tape in linux and I was wondering if someone can answer
> this questions.
First - you need 'mt' tools installed.
>
> is it possible to extract selected file or files from an archive without
> extracting all the data from the tape?
Extract separate files like this:
tar xvf /dev/st0 /home/user/file01
>
> is it possible to add a directory with files to a tape archive? (tape has an
> existing data on it)
Jump to the end of data:
mt -f /dev/nst0 eod
And add directory
tar cvf /dev/nst0 /home/dir
>
> is it possible to get the tape usage?
Rewind to the end of data and get current block, see man mt. Then
calculate taken space.
>
> what i usually do is tar -cvf /dev/st0 ..... .... ....
Use /dev/nst0 for multiple archives, this device doesn't rewind tape
after command execution. For instance, you have 5 archives on a tape.
To extract file /etc/passwd from archive #3, execute:
mt -f /dev/nst0 fsf 3
tar xvf /dev/nst0 /etc/passwd
mt -f /dev/nst0 rewind
>
>
>
> TIA,
>
>
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