Re: Will rsync fix iso-file checksum failure?
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Klistvud wrote:
> Dne, 26. 11. 2009 13:27:23 je Justin Piszcz napisal(a):
>
>> Yes its possible but you need the image OR someone who has the
>> image on another host to split it up and see which part is bad.
>>
>> 1. split the dvd into 1 mb chunks (or larger) (must be same split
>> both sides) 2. md5sum each on both side, run a diff between the
>> md5sum output 3. replace the bad 1mb chunk 4. cat files back
>> together to make a fixed iso 5. re-run md5 check confirm its
>> fixed
>>
>> Justin.
>
> Seems like a lot of work. Maybe you'll be better off if you grab a
> torrent file of the iso, start downloading the torrent, and then
> just stop the download. You then copy your old iso over the new one
> (i.e. you replace the new download with it), and upon restarting,
> your bittorrent client will re-check the iso and only download the
> missing/wrong chunks. This may even be possible with jigdo, but
> I've never used jigdo (yet), so can't say.
Jigdo will also work, because it does in fact break up de ISO in
blocks (packages) and will create checksums for all those parts. You
can point it to an existing ISO and it will read it and determine
which blocks are already present and/or need redownloading.
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