The gzip Recovery Toolkit
So you thought you had your files backed up - until
it came time to restore. Then you found out that you had bad sectors and
you've lost almost everything because gzip craps out 10% of the way through
your archive. The gzip Recovery Toolkit has a program - gzrecover - that
attempts to skip over bad data in a gzip archive. This saved me from
exactly the above situation. Hopefully it will help you as well.
I'm very eager for feedback on this program. If you download
and try it, I'd appreciate and email letting me know what your results were.
My email is
99% of "corrupted" gzip archives are caused by transferring
the file via FTP in ASCII mode instead of binary mode. Please re-transfer
the file in the correct mode first before attempting to recover from a file
you believe is corrupted.
Disclaimer and Warning
This program is provided AS IS with absolutely NO WARRANTY. It is not
guaranteed to recover anything from your file, nor is what it does recover
guaranteed to be good data. The bigger your file, the more likely that
something will be extracted from it. Also keep in mind that this program
gets faked out and is likely to "recover" some bad data. Everything
should be manually verified.
Downloading and Installing
You need the following packages:
- gzrt-0.7.tar.gz (2013-02-02)
- gzrt sources
- github repository
- zlib - You might already have this.
- GNU cpio (version 2.6 or higher) -
Only if your archive is a compressed tar file and you don't already have this (try "cpio --version" to find out)
First, build and install zlib if necessary. Next, unpack the gzrt sources.
Then cd to the gzrt directory and build the gzrecover program by typing
make. Install manually by copying to the directory of your
Run gzrecover on a corrupted .gz file. Anything that can be read from
the file will be written to a file with the same name, but with a
.recovered appended (any .gz is stripped). You can override this with