From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S264141AbTL3B33 (ORCPT ); Mon, 29 Dec 2003 20:29:29 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S264290AbTL3B33 (ORCPT ); Mon, 29 Dec 2003 20:29:29 -0500 Received: from mx1.redhat.com ([66.187.233.31]:5066 "EHLO mx1.redhat.com") by vger.kernel.org with ESMTP id S264141AbTL3B31 (ORCPT ); Mon, 29 Dec 2003 20:29:27 -0500 Date: Tue, 30 Dec 2003 01:27:15 +0000 From: Dave Jones To: Thomas Molina Cc: Martin Schlemmer , Linus Torvalds , Kernel Mailing List Subject: Re: 2.6.0 performance problems Message-ID: <20031230012715.GA30369@redhat.com> Mail-Followup-To: Dave Jones , Thomas Molina , Martin Schlemmer , Linus Torvalds , Kernel Mailing List References: <1072741422.25741.67.camel@nosferatu.lan> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.5.4i Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org 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