[nSLUG] tarball extract failing

Daniel Morrison draker at gmail.com
Wed Aug 24 02:33:22 ADT 2011

I gather this is more a gunzip problem than a tar problem. tar will
skip over corruption and resume at the next recognizable valid block.
So you have to get over the gunzip corruption by restarting the gunzip
after the broken part. There's a technical explanation of how to do
this here:


A tool that possibly automates this procedure is gzrecover:


I've never been misfortunate enough to have to try these tools though,
so I can't say how well they work.

Good luck!


On 24 August 2011 01:56, Daniel Arndt <danielarndt at gmail.com> wrote:
> Have you tried extracting specific files (something along the lines
> of http://www.cyberciti.biz/faq/linux-unix-extracting-specific-files/)
> rather than attempting the whole tgz? Perhaps if you avoid the Library
> directory (or just extracting the exact file you want) you'll have some
> luck. Unfortunately, since it is compressed, if there is corruption in the
> Library directory it may (likely) cause corruption in other parts as well..
> --
> Daniel Arndt
> http://web.cs.dal.ca/~darndt/
> On Wed, Aug 24, 2011 at 01:48, Nancy <nancy at esnesnon.com> wrote:
>> Does anyone know how I might extract some files from a .tgz file that
>> seems to have something in it that makes it kack only a few GBs into the
>> extract? It's a tarball of my OS X homedir and I'm pretty sure the offending
>> file is in the Library directory. The tarball is a couple of years old and
>> every now and then I pull it out and try (unsuccessfully) to rescue photos
>> of my cat (that passed away). These are the only good photos of her that I
>> have, so I never give up trying.
>> If there is a way for me to "look" in the file and cherry-pick what I
>> want, that would be the ultimate. I can't even remember all of the things I
>> have tried to get this file extracted - there have been so many: cmd line
>> tools and graphical ones. I have tried both Linux (Debian) and OS X to no
>> avail.
>> Any help would be appreciated!
>> -n-
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