Holger Parplies wrote at about 00:52:47 +0100 on Saturday, November 1, 2008:
> Hi,
>
> Jeffrey J. Kosowsky wrote on 2008-10-31 15:26:58 -0400 [Re: [BackupPC-users]
> 2 cpool files with same checksum, different (compressed content) but same
> zcatt'ed content?????]:
> > Les Mikesell wrote at about 10:27:20 -0500 on Friday, October 31, 2008:
> > > Jeffrey J. Kosowsky wrote:
> > > >
> > > > Is there a (reasonably easy) way of identifying which ones have the
> > > > rsync checksum seed and which ones don't???
> > >
> > > I think you are kind of missing the point that they could both be
> > > corrupted in other ways...
>
> I don't think these files as such are corrupted. They are decompressible (to
> identical contents). I wouldn't trust the backup(s) as a whole - they may be
> missing files for instance - but that's a different matter.
Exactly.
>
> > I know but I would still like to understand this better since I am
> > writing some utilities to clean this up (with the caveat being that it
> > may still be corrupted)
>
> I admit that I am missing the point why you are going to the trouble, but to
> answer your question: it doesn't matter. BackupPC will add the checksums at
> the appropriate time (next backup, I'd say) if they are missing
> (and enabled).
Well, I'm not sure why I'm going to the trouble except that I am
learning a lot plus I am writing my own scripts (which I will share
when done) to check and correct corrupted pools (which may be
necessary at some later point when I REALLY need it)
> That said, I'd expect the version with checksums to be larger, because the
> compressed content should be identical. Add to that the checksums in one case
> and nothing in the other.
>
Is there anywhere where the specific format of the rsync checksums is
documented in terms of how they are computed and where they are added
to the pool files?
Thanks
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