Hi,

> >I wanted to check if very carefully (Sis 655). DMA seems to 
> be enabled
> >for HDD. But still there are some problems OR with 2.4.21 at all (I
> >quess something wrong generally in IDE support) OR still with Sis
> >driver. Why ? It seems, that DMA is NOT enabled for DVD and 
> CDRW. I hear
> >it - they work very slow. Also hdparm shows errors, when get 
> info about
> >them. In attachments examples.
> Please, send us your exact kernel version and the .config 
> file used to 
> make your kernel.

Config in attachment. Kernel is from Mandrake 9.1 with Your patch added
(version in Makefile in attachment). I had similiar problems with CDRW,
DVD and kernel 2.4.20 patched to 2.4.21 pre 7 or similiar (on my old
PC).

Pozdrowienia/Best Regards
-- 
Marcin Wiacek (www.mwiacek.com marcin@mwiacek.com)