Hi,

On Sat, Dec 01, 2001 at 02:07:41PM +1030, Greg Lehey wrote:

> > so my drive is now running at UDMA 100.
> 
> Can you send me dmesg output?  In particular, I had a printf output
> there to show what the BIOS had set.
> 
> Background for other people: Richard has an IDE chip which claims to
> be a SiS 5591, which according to the data sheet can't do better than
> UDMA 33.  When he runs Linux on the box, however, it claims to be
> running at UDMA 100, and this hack seems to have had the same effect.

Is this patch available somewhere, or could you send it to me?  I have the
same chipset on an Asus Athlon mobo:

atapci0: <SiS 5591 ATA33 controller> port 0xd800-0xd80f at device 0.1 on pci0

And yes, Linux can run it at UDMA100, and the printed datasheet of the
board says it's an UDMA100-capable chip. (The SiS doc says UDMA33).


Thanks

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