Re: 2.6.0 performance problems

From: Dave Jones
Date: Mon Dec 29 2003 - 20:31:03 EST


On Mon, Dec 29, 2003 at 07:17:23PM -0500, Thomas Molina wrote:

> > > UDMA modes: udma0 udma1 *udma2 udma3 udma4
> > > AdvancedPM=yes: mode=0x80 (128) WriteCache=enabled
> > > Drive conforms to: ATA/ATAPI-5 T13 1321D revision 1:
> > Any reason it is currently set to udma2 where it support udma4 ?
>
> Not really. The question was what mode the disk was running in. This is
> what it defaults to. This is a laptop drive that only runs at 5400RPM.
> Would changing the mode to udma4 make a dramatic difference?

It's not uncommon for a laptop to have a hard disk which supports
higher DMA modes than what the IDE chipset supports.
My aging Intel 440BX based VAIO has a disk in the same configuration
as yours, supports udma4, but chipset only goes up to udma2.

Dave

--
Dave Jones http://www.codemonkey.org.uk
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/