Re: Data corruption reading IDE CD-ROM in 2.2.x

[Jens Axboe]

On Sun, Jan 09 2000, Kernel List wrote:
> > The Red Hat supplied kernel doesn't utilize DMA per default, AFAIK.
> > It looks as if you are using DMA with 2.2.14, and that is probably
> > what makes the difference. Have you tried switching DMA on or off?
> > Did that change anything?
> > 
> I think you will find it is DMA on the samsung, I have a 2304 (I think,

That is possible, although you can't really compare two different
models like that.

> its not plugged in at the moment) which always had major corruption
> when DMA was enabled. Under windows the CDROM hardly operated at
> all when DMA was activated approx 50% of the time the machine
> would lock. These problems dont appear to affect my DVD drive
> making me thing the cd drive is at fault. It works perfectly
> when DMA is disabled though.

I'm not suprised that DMA is buggy on your drive, I've seen it on
one too many CD-ROM drives myself.

-- 
*  Jens Axboe <[e-mail]>
*  Linux CD-ROM Maintainer
*  http://www.kernel.dk