Re: DMA not works in Linux 2.6.12, but in Windows works fine.

[Jeff Garzik]

Ivan G wrote:
> Problem descrition:
>
> DMA not works in Linux 2.6.12, but in Windows works fine.
>
> DMA not works with HDD and CD drives connected by 80-conductor
> cable to secondary IDE port (ide1).

This is expected behavior.

This is a limitation of "combined mode".  Turn off combined mode 
(sometimes called 'legacy' mode) in your BIOS, if your BIOS lets you.

	Jeff



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