Messages in this thread | | | Subject | Re: 2.6.0 performance problems | From | Martin Schlemmer <> | Date | Tue, 30 Dec 2003 03:37:44 +0200 |
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On Tue, 2003-12-30 at 03:27, Dave Jones wrote: > 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. >
Right, or as somebody else pointed out, it might not be a 80-pin cable.
Lets rephrase - does it also run in udma2 mode with 2.4 ? And did you check readahead? In 2.6 it seems that a bigger value is better - I for instance have to set it to 8192 to have the same performance as in 2.4 ...
-- Martin Schlemmer [unhandled content-type:application/pgp-signature] | |