Re: [rdiff-backup-users] Exception 'CRC check failed'

[rdiff]

On Fri, 26 Jan 2007, Guenevere Prawiroatmodjo wrote:

> Hello,
>
> My last backup failed because of a hardware error, which probably caused some 
> corrupt files in the process. When I use --check-desination-dir on the backup 
> folder the following error msg appears:

This problem has come up many times on the mailing list, and so far there 
is not a good fix for it.  DEVELOPERS: If you can think of a good fix 
which could be added to --check-destination-dir, this would be wonderful!

I don't know enough about the inner workings of the rdiff-backup-data 
tree, but usually this error appears when one of the .gz files was 
incomplete.  Try this:

find rdiff-backup-data/ -name '*.gz" | while read a; do
        echo -n "$a:"
        gzip --test "$a"
done

This will tell you which files are bad.  In our case, we had a problem 
with the mirror_metadata files.  Search the archive for specifics, but 
basically I copied a good mirror_metadata over the bad mirror_metadata and 
crossed my fingers.  It worked for us, though I do not know the 
implications here.  After doing this surgery, you might try a restore of 
the past few backup dates and make sure it is successful.  Worst case, you 
rm-rf rdiff-backup-data, though you will loose your increments.  If you 
come up with any good ideas, please let us know!

-Eric