Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S262256AbUDOMjX (ORCPT ); Thu, 15 Apr 2004 08:39:23 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S262974AbUDOMjX (ORCPT ); Thu, 15 Apr 2004 08:39:23 -0400 Received: from 168.imtp.Ilyichevsk.Odessa.UA ([195.66.192.168]:23817 "HELO port.imtp.ilyichevsk.odessa.ua") by vger.kernel.org with SMTP id S262256AbUDOMjV convert rfc822-to-8bit (ORCPT ); Thu, 15 Apr 2004 08:39:21 -0400 Content-Type: text/plain; charset="iso-8859-1" From: Denis Vlasenko To: kos@supportwizard.com, Lenar =?iso-8859-1?q?L=F5hmus?= Subject: Re: poor sata performance on 2.6 Date: Thu, 15 Apr 2004 15:37:38 +0300 X-Mailer: KMail [version 1.4] Cc: linux-kernel@vger.kernel.org, linux-ide@vger.kernel.org References: <200404150236.05894.kos@supportwizard.com> <407E35E0.3080902@vision.ee> <200404151440.23858.kos@supportwizard.com> In-Reply-To: <200404151440.23858.kos@supportwizard.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8BIT Message-Id: <200404151537.38739.vda@port.imtp.ilyichevsk.odessa.ua> Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1474 Lines: 42 On Thursday 15 April 2004 13:40, Konstantin Sobolev wrote: > On Thursday 15 April 2004 11:12, Lenar L?hmus wrote: > > >for sata_sil: > > > > > >/dev/sda: > > > Timing buffer-cache reads: 1412 MB in 2.00 seconds = 705.05 MB/sec > > > Timing buffered disk reads: 84 MB in 3.06 seconds = 27.43 MB/sec > > > > > >So my old IDE HDD appears to be considerably faster. Expected results > > > were 55-70MB/s. > > > > With same hard drive connected to 3ware S-ATA controller I got > > 40-50MB/sec with hdparm on 2.6.4 and 2.6.5. Then > > tried to hdparm -a 8192 /dev/sda, and got this: > > > > /dev/sda: > > Timing buffer-cache reads: 2056 MB in 2.00 seconds = 1027.13 MB/sec > > Timing buffered disk reads: 266 MB in 3.00 seconds = 88.53 MB/sec > > > > So you may try that switch, maybe helps. > > unfortunately it doesn't: > > /dev/sda: > setting fs readahead to 8192 > readahead = 8192 (on) > Timing buffered disk reads: 84 MB in 3.06 seconds = 27.46 MB/sec 27 Mb/s is not 'very' bad for 80Gb drive. Can you verify that drive indeed is able to do better (quick test under Windows is in order)? It would be silly to try to hunt down problem which do not exist. If problem does exist, try 2.4 kernels. -- vda - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/