Re: [Bug-grub] [help] how force grub to disable UDMA2?

[Jason Thomas]

compile your kernel WITHOUT "use dma by default", or something similiar
in the ide options.

On Tue, May 07, 2002 at 04:19:22AM +0200, acrux wrote:
> With linux during bootup the system freezes or very very seldom it waits for 
> four (4) DMA timeouts then  disables DMA and then mounts the filesystem.
> 
> I read the Ultra-DMA mini HOWTO and didn' t find anything that looked helpful 
> 'cause the hdparm-4.9 doesn't keep the PIO MODE 4 after a reboot and so i'm 
> unable to keep my system overclocked in linux.
> I disabled DMA in the BIOS but that didn't change anything -- linux does a 
> bypass of CMOS settings and enables the UDMA ( and the ACPI function too) and 
> obviously freezes.
> 
> I want to know haw to set GRUB - if it's possible - to force linux to use 
> this HDD like a PIO4 (as well as bios settings) and not like a UDMA33.