From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S261282AbVGYUi1 (ORCPT ); Mon, 25 Jul 2005 16:38:27 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S261492AbVGYUi1 (ORCPT ); Mon, 25 Jul 2005 16:38:27 -0400 Received: from zproxy.gmail.com ([64.233.162.203]:44339 "EHLO zproxy.gmail.com") by vger.kernel.org with ESMTP id S261282AbVGYUi0 convert rfc822-to-8bit (ORCPT ); Mon, 25 Jul 2005 16:38:26 -0400 DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws; s=beta; d=gmail.com; h=received:message-id:date:from:reply-to:to:subject:cc:in-reply-to:mime-version:content-type:content-transfer-encoding:content-disposition:references; b=LdSfZczXAZA7i3egIGwHxV6dEgEtP8OQ5WPLvByV1ML1yo1lnw6QTweZn4KzkJxGf8op1z0zlHsUFhVYj7NLB4L+3rmnhvSubdhX01p6ImholwP+AGzRny3mbmIuoViMWtH0LbaUPDQqPOhPKBA7kn0U6r2i1/OfG8BncrGsiPo= Message-ID: <9a874849050725133853953bd4@mail.gmail.com> Date: Mon, 25 Jul 2005 22:38:25 +0200 From: Jesper Juhl Reply-To: Jesper Juhl To: Erik Mouw Subject: Re: Problem with Asus P4C800-DX and P4 -Northwood- Cc: Andreas Baer , Willy Tarreau , linux-kernel@vger.kernel.org, pmarques@grupopie.com In-Reply-To: <20050725200330.GA20811@harddisk-recovery.nl> Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7BIT Content-Disposition: inline References: <42E4373D.1070607@gmx.net> <20050725051236.GS8907@alpha.home.local> <42E4E4B0.6050904@gmx.net> <20050725152425.GA24568@alpha.home.local> <42E542D5.3080905@gmx.net> <20050725200330.GA20811@harddisk-recovery.nl> Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On 7/25/05, Erik Mouw wrote: > On Mon, Jul 25, 2005 at 09:51:49PM +0200, Andreas Baer wrote: > > > > Willy Tarreau wrote: > > >On Mon, Jul 25, 2005 at 03:10:08PM +0200, Andreas Baer wrote: > > >>Here I have > > >> > > >> /dev/hda: 26.91 MB/sec > > >> /dev/hda1: 26.90 MB/sec (Windows FAT32) > > >> /dev/hda7: 17.89 MB/sec (Linux EXT3) > > >> > > >>Could you give me a reason how this is possible? > > > > > > > > >a reason for what ? the fact that the notebook performs faster than the > > >desktop while slower on I/O ? > > > > No, a reason why the partition with Linux (ReiserFS or Ext3) is always > > slower > > than the Windows partition? > > Easy: Drives don't have the same speed on all tracks. The platters are > built-up from zones with different recording densities: zones near the > center of the platters have a lower recording density and hence a lower > datarate (less bits/second pass under the head). Zones at the outer > diameter have a higher recording density and a higher datarate. > It's even more complex than that as far as I know, you also have the issue of seek times - tracks near the middle of the platter will be nearer the head more often (on average) then tracks at the edge. For people who like visuals, IBM has a nice little picture in their AIX performance tuning guide : http://publib.boulder.ibm.com/infocenter/pseries/index.jsp?topic=/com.ibm.aix.doc/aixbman/prftungd/diskperf2.htm -- Jesper Juhl Don't top-post http://www.catb.org/~esr/jargon/html/T/top-post.html Plain text mails only, please http://www.expita.com/nomime.html