Paranoia-dev a mailing list for the core Paranoia development team.

Mikko Nummelin | 13 Apr 2003 00:33

Re: Paranoia IV

On Sat, 12 Apr 2003, Laurent Pinchart wrote:

> Hi everybody,
>
> I'm currently trying to extract audio tracks from a protected audio disc.
>
> The disc contains a corrupted TOC, and some sectors contain errors.
>
> The TOC can be read properly by my Hitachi DVD drive, but not by my Plextor
> CD-RW driver. I modified CD Paranoia III 9.8 to get the TOC correctly on the
> CD-RW drive (using the READ TOC command, format Full TOC), and this works
> fine.
>
> I'm now trying to fix the erroneous sectors problem. The CD can be played on
> an audio CD player, so the data are not corrupted. I suspect the CIRC and/or
> Q sub-channel data to be corrupted, so that a 'smart' CD drive will fail to
> read the data.
>
> I'm thinking about setting the TB (Transfer Block) byte in the Error Recovery
> Parameters page to 1, so that the data will be transfered to the host even
> when an unrecoverable read error occured.
>
> I have several questions:
>
> 1) Is CD Paranoia still maintained ? If so, has anyone worked on the problems
> I described ? I don't want to fix things that are already fixed in CD
> Paranoia IV.
>
> 2) Does anyone know why some drives are able to read the TOC properly while
> other are not ? I suppose that's because the drives use different methods to

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headers

Laurent Pinchart | 13 Apr 2003 01:20

Re: Paranoia IV

Hi Mikko,

> A Finnish hacker (whose name I don't provide without permission) sent a
> patch to me solving this problem. It adds a new '-P' switch to
> cdparanoia command, which allows ripping Cactus-protected CD's with
> Plextor. It (a) changes the way TOC is read, (b) alters the reading
> command.

I had implemented the same TOC read (mine was a bit more generic as it read 
all the sessions, but that's not needed to rip audio tracks which are always 
located in the first session). So this is definitely an improvement, and 
works with most MMC drives (not only Plextor).

Unfortunately, the reading command used by the patch (READ CD-DA, 0xD8) 
doesn't work neither on my Plextor drive (PLEXTOR CD-R   PX-W1210A 1.07) nor 
on my Hitachi drive (HITACHI DVD-ROM GD-7500 0005) better than the plain READ 
CD command. I would really like to know what causes the difference between 
the CD drives when reading corrupted audio sectors (and also how exactly the 
different copy protection methods corrupt the sectors).

Laurent Pinchart

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