Re: 2.2.18, Intel i815 chipset and DMA

From: David Rees (dbr@greenhydrant.com)
Date: Fri Mar 09 2001 - 21:57:03 EST

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On Fri, Mar 09, 2001 at 05:21:36PM +0000, Alan Cox wrote:
> > I've got a Gateway here with a Intel 815 chipset running 2.2.18. Inside
> > it's a PIII 733 with 512MB and a Quantum lct15 drive.
>
> The UDMA100 on the i810/815 is supported by 2.4
>
> > turn it on? The drive should be capable of 10-20MB/s, but I'm
> > only getting about 4MB/s with hdparm. :-(
>
> /dev/hda:
> Timing buffered disk reads: 64 MB in 2.62 seconds = 24.43 MB/sec
>
> [2.4.2ac17]

OK, I moved the machine to 2.4.2, hdparm is now reading 20MB/sec from
each disk as expected.

Thanks for the tips,
Dave
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