Subject: Re: pciide cd-r trouble
To: Steve Woodford <>
From: Manuel Bouyer <>
List: current-users
Date: 10/08/2000 13:29:36
On Sun, Oct 08, 2000 at 11:54:15AM +0100, Steve Woodford wrote:
> It's my opinion that the GENERIC and INSTALL kernels should disable DMA
> for all atapi cd(4) devices. I've had sufficient grief with misbehaving
> CD-{ROM,RW} drives that I do this routinely here.
> A flags value of 0x0ff0 should be sufficient to make just about every
> atapi cd drive on the planet work "Out the Box".

Hum, all but one CD drive I have here can do DMA properly. And for the one
failing to do it, the driver downgrades to PIO properly.
It would be better to improve the downgrade code if needed.

Manuel Bouyer <>