Subject: Re: pciide cd-r trouble
To: Sebastian Sala <>
From: Steve Woodford <>
List: current-users
Date: 10/04/2000 18:51:01
On Wed, 4 Oct 2000, Sebastian Sala wrote:

> I've had cd burning problems since the stable NetBSD 1.4. My cd-r is a 
> hp-7100 cdrw, connected to the secondary ide as the slave.


> cd1(pciide0:1:1): using PIO mode 0, DMA mode 1 (using DMA data transfers)


> Then a question to to previous, why does the kernel choose pio mode 0
> for cd1, even though it supports pio mode 3?

I've had similar grief with various IDE CD drives. Try building a
kernel from a config file which forces no DMA, PIO mode 3 for cd1:

	cd1 at atapibus? drive ? flags 0x0ffb

There's a comment above the "wd* at pciide?" line which explains the

Cheers, Steve