Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S263707AbUDODy4 (ORCPT ); Wed, 14 Apr 2004 23:54:56 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S263724AbUDODy4 (ORCPT ); Wed, 14 Apr 2004 23:54:56 -0400 Received: from selene.LaTech.edu ([138.47.18.25]:24271 "EHLO LaTech.edu") by vger.kernel.org with ESMTP id S263707AbUDODyw (ORCPT ); Wed, 14 Apr 2004 23:54:52 -0400 Message-ID: <1082001287.407e0787f3c48@webmail.LaTech.edu> Date: Wed, 14 Apr 2004 22:54:47 -0500 From: Ryan Geoffrey Bourgeois To: Konstantin Sobolev Cc: linux-kernel@vger.kernel.org, linux-ide@vger.kernel.org Subject: Re: poor sata performance on 2.6 References: <200404150236.05894.kos@supportwizard.com> In-Reply-To: <200404150236.05894.kos@supportwizard.com> MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7BIT User-Agent: Internet Messaging Program (IMP) 3.2.2 / FreeBSD-4.8 X-Originating-IP: 138.47.118.132 Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1597 Lines: 41 Quoting Konstantin Sobolev : > /dev/hde: > Timing buffer-cache reads: 1436 MB in 2.00 seconds = 717.03 MB/sec > Timing buffered disk reads: 100 MB in 3.03 seconds = 32.95 MB/sec > > 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. Which kernel version did you get these results using? Have you speed-tested the drive(s) on a different SATA controller? I don't mean to imply that you should buy another one - that would be rediculuous since your motherboard should laready has it - but it would help to eliminate possible causes of error. I took the same readings on my machine. I'm using an ASUS SK8N motherboard - that's the Promise TX2 SATA controller - with Western Digital's 36gb 10K RPM Raptor: /dev/sda: Timing buffer-cache reads: 128 MB in 0.12 seconds =1075.79 MB/sec Timing buffered disk reads: 64 MB in 1.20 seconds = 53.43 MB/sec I'm using the latest stable vanilla kernel (2.6.5), compiled today. It would also help to have your kernel config, if at all possible. -Ryan ------------------------------------------------- This mail sent through IMP: http://horde.org/imp/ - 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/