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Date: Tue, 14 Feb 2012 08:56:00 +0100
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From: _ <pancakeking79@gmail.com>
To: Adam Vande More <amvandemore@gmail.com>
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Cc: ken@mthelicon.com, freebsd-questions <freebsd-questions@freebsd.org>
Subject: Re: corrupted tar.gz archive - I lost my backups :)/:(
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2012/2/14, Adam Vande More <amvandemore@gmail.com>:
> On Mon, Feb 13, 2012 at 7:56 PM, _ <pancakeking79@gmail.com> wrote:
>
>> Before making the move from 7.0 to 8.2, I ran a little script that did a
>> backup of selected files
>> and folders.
>>
>
> I think it's IT tip #2 "You don't have a backup unless it's tested".  #1 is
> "Make a backup".

If I am not mistaken, I did test my backups and they worked fine.
After all, one of the four files that I have unpacks with no problems
so I don't see where things could have gone wrong.

> You could try archivers/gzrecover

After gzrecover and cpio, the process stops at the same point where
the tar(1) command stops. It simply doesn't make it beyond the
boundary where the file is corrupted.

> Good luck,
>
> --
> Adam Vande More
>


Here is what pax(1) gave me:

# pax -rzf su12292011.tar.gz
pax: Invalid header, starting valid header search.
gzip: data stream error
pax: End of archive volume 1 reached

ATTENTION! pax archive volume change required.
Ready for archive volume: 2
Input archive name or "." to quit pax.
Archive name > .
Quitting pax!
#

Nothing new here. It seems like pax simply invokes gzip(1) internally.