Re: [Cdrdao-devel] Generic-mmc-raw with multi session

[Andreas M. <an...@da...>]

On Tue, 2002-06-25 at 23:49, Tuomas Suutari wrote:
> My CD-writing device (HP CD-Writer+ 9150i -- identified as HP 
> CD-Writer+ 9100c Rev: H2,1) fails to write CDs with generic-mmc 
> driver with cdrdao. I've tried with versions 1.1.5 and 1.1.6-pre2 
> (CVS) but with no luck.
>
> [...]
> 
> I've wrote some CD's with generic-mmc-raw driver successfully, but it 
> doesn't support multi session. Now I'm wondering how could I make a 
> CD-EXTRA? I need support for multi session mode in generic-mmc-raw.

Currently, you won't be able to create a CD-EXTRA in DAO mode with 
cdrdao. I quiet sure that your recorder model does not support the
SAO interface (generic-mmc driver) but you should double check this
with other mastering tools (e.g. cdrecord or the demo version of 
cdrwin).
 
> Is it even possible to add multi session support to generic-mmc-raw 
> driver? If it's possible, is it a big work to add it? I might be 
> intressed to even code something, if somebody could help me with it. 
> Where can I find needed specifications, manuals, standards etc.?

In principle it is possible but I'm not sure if you recorder already
supports it. There are two flavours of raw-DAO implementations. One 
writes the PMA (Program Memory Area) of the disk after recording,
the other not. Only if the PMA is writting you can think of creating
a multi session disk. However, I think the first recorders that write
the PMA in raw-DAO showed up last year or at the of the year before
last year.

I already started with multi session support for the generic-mmc-raw
driver some time ago. I got stuck at finding out what power calibration
paramters must be written to TOC. 90% of the required code is probably
already written. If you are interested you can try to complete the code
and make some test runs without setting the power calibration 
parameters. You will find the required information in the document
available from ftp://ftp.t10.org/t10/drafts/mmc3/.
I can also help you later on but I'll right now focus on the next
cdrdao release which is very close.

Regards,
Andreas
-- 
Andreas Mueller                  Tel: +49 89 67808848
Ramsmeierstr. 1                Email: an...@da...
85579 Neubiberg, Germany