Re: PROBLEM: CD burning at 12x uses excessive CPU, although DMA is enabled

[Sergio Bruder <sergio@bruder.net>]

On Fri, Aug 30, 2002 at 06:58:09PM +0200, Markus Plail wrote:
> Hi Anssi!
> 
> * Anssi Saari writes:
> >On Fri, Aug 30, 2002 at 09:27:04AM +0200, Markus Plail wrote:
> >>* Anssi Saari writes:
> >>>I also don't have your DAO vs. TAO problem.
> >>
> >>Hmm.. you wrote that cdrdao gives the problem, but cdrecord doesn't.
> >
> >I doubt that. Even if I did, it's wrong.
> 
> Yes, sorry, it was Sergio.
> 
> (...)
>
> If you write CDs in RAW modes, then there's the problem with the high
> loads. Examples:
> - cdrecord -raw96r/p (2448 bytes/sector)
> - cdrecord -raw16    (2368 bytes/sector)
> - cdrdao --driver generic-mmc-raw (2368 bytes/sector)
> 
> So for Sergio: Try using the generic-mmc without raw driver in cdrdao.
>

I was using exactly generic-mmc, never tried the raw version.

I only said that with ISO images the problem dont show up, as Anssi.

> 
> And audio CDs or (S)VCDs are written in mode2 (2352 bytes/sector) and
> also cause the high loads, this time independent from the writing mode.
> AFAIK this behaviour should be the same on any Linux system.


Sergio Bruder
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