On Tue, 22 Jan 2013 22:58:47 -0500, Filipus Klutiero wrote:

> >>Do you happen to see any pattern (maybe in the used filesystems) in
> >>the successful/failing DVDs?
> >None that fills my sight anyway... as I said, some ISO9660 discs
> >cannot be verified, while one can be verified. So, whether a disc
> >can or cannot be verified does not only depend on the filesystem.
> Sorry, I sent this too soon.
> First, clearly the DVD is not a CD-ROM.
> The filesystem used by Civilization V is UDF. Indeed, there is no
> case for UDF in cdck.

Ah, too bad, but good to know.
 
> As for the Debian ISO9660 images, I think I found how the Etch disk
> differs from the Lenny and Squeeze disks. Here is what disktype says
> on the latter:

[..]

Thanks!

> I do not understand why the etch disc has a track only 308 MB in
> size. But certainly, if that matters for cdck, then the 0 bytes
> track of more recent discs will prevent verification.

Alright, another interesting (and unpleasant) piece in this puzzle :/

Thanks again for all your research.


Cheers,
gregor

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