cpio: I/O error - chance to circumvent ?

[Heiner Steven]

Dr. Zimmermann wrote:

> Our data is backup'd using cpio (GNU cpio version 2.4.2) to a DAT tape
> (3 volumes). Trying to restore leads to an 'cpio error: I/O error`
> during
> restore of the second volume. SUN cpio has an option to skip over
> corrupt
> data but cannot read the tape written by GNU cpio. Do I have a chance to
> retrieve data from behind the I/O error ?

Did you use the "-I" option to specify the input device to cpio?
If you redirected the input directly from the tape device,
at least Solaris "cpio" will print that error message for
multiple volumes. In other words: did you use "cpio -i -I /dev/rmt/0"
instead of "cpio -i < /dev/rmt/0"?

Heiner
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___ _
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[Dr. Zimmermann]

Heiner Steven wrote:

> Dr. Zimmermann wrote:
>

> > Our data is backup'd using cpio (GNU cpio version 2.4.2) to a DAT tape
> > (3 volumes). Trying to restore leads to an 'cpio error: I/O error`
> > during
> > restore of the second volume. SUN cpio has an option to skip over
> > corrupt
> > data but cannot read the tape written by GNU cpio. Do I have a chance to
> > retrieve data from behind the I/O error ?

>
> Did you use the "-I" option to specify the input device to cpio?
> If you redirected the input directly from the tape device,
> at least Solaris "cpio" will print that error message for
> multiple volumes. In other words: did you use "cpio -i -I /dev/rmt/0"
> instead of "cpio -i < /dev/rmt/0"?
>
> Heiner
> --
> ___ _
> / __| |_ _____ _____ _ _ Heiner STEVEN <heiner.steven@nexgo.de>
> \__ \ _/ -_) V / -_) ' \ Shell Script Programmers: visit
> |___/\__\___|\_/\___|_||_| [url]http://www.shelldorado.com/[/url]

Hello Heiner,

I didn't used the '-I ' option to specify the tape device - Thnx for that
suggestion.
Unluckily using this option does not make any difference.

BUT: in a kind of 'accident' I came to the following 'insight' - Sun cpio
requires the setting
of the LANG variable must be the same during retrieve as during store ...
Otherwise You'll get a message about 'invalid headertype' and Sun cpio stops
with an error.

I regard this is an error instead of a feature ... at least the message is
misleading.
In the manpage there is nothing to be found about this behaviour.

Now I'm trying Sun cpio with the -k option to get behind the read error ...
press Your thumbs :-)

Roger

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Dr. Roger Zimmermann *** Institute of Physiology, Hamburg
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