IDE with/without DMA on Sun Blade 100

["Olivier Hochreutiner" <olivier.hochreutiner@epfl.ch>]

Hi,

I managed to install Woody on my Sun Blade 100 and it works well.
There is only a small thing I would like to fix : when the DMA mode is
enabled I sometime get some errors when I try to read something on a
CD-ROM with the DVD-ROM drive of my Blade. To avoid this problem I have
to boot with the option "ide=nodma" but the performance loss is quite
big.
So is there a way to disable the DMA only for the DVD drive without
affecting the hard drive ?
Note that I use kernel 2.4.19rc3 (the problem is the same with kernel
2.4.18) but I did not try any 2.5.x version.

Olivier Hochreutiner
EPFL - SSC
olivier.hochreutiner@epfl.ch

P.S. : Sorry for my English...