Re: Question about hdparm & dma.

From: Murray J. Root (murrayr@brain.org)
Date: Sat Mar 22 2003 - 09:41:09 EST

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On Sat, Mar 22, 2003 at 02:56:51PM +0000, Alan Cox wrote:
> On Sat, 2003-03-22 at 11:52, Justin Piszcz wrote:
> > My question is, how is it possible to get > 33MB/s in only UDMA Mode 2
> > (the linux driver only supports up to UDMA2).
>
> You can overclock things if you have the setup wrong.
>
> > So basically I am wondering if udma mode 5 will be supported for SIS
> > chipsets.
>
> I'm wondering if SiS are ever going to provide useful documentation.
> SiS won't deal with individuals only companies which complicates matters
>

Well, if you're not getting good docs from SiS I commend you on your abilities.
My P4S533 (SiS645DX chipset) is doing decently well with a Maxtor ATA/133 100G
drive. It's only a 5400rpm drive and nearly matches the 120G WD ATA/100 7200rpm
in my Dell for hdparm speeds. I was a little disappointed in the speed
comparisons till I saw that you're doing this blind.

Thanks.

-- Murray J. Root

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