From mboxrd@z Thu Jan 1 00:00:00 1970 From: Tejun Heo Subject: Re: sata_sil24 stability and performance Date: Thu, 06 Mar 2008 16:08:48 +0900 Message-ID: <47CF9880.4080900@gmail.com> References: <47BAF677.5000602@rtr.ca> <20080302061453.GA7291@denix.org> <005d01c87c4c$0d01f550$4d0fa8c0@M2007> <47CC9197.9050609@gmail.com> <20080304002215.GA13317@denix.org> <47CCC1C6.5010600@gmail.com> <20080304062942.GA14335@denix.org> <47CE55B3.6070701@gmail.com> <20080306041454.GA7242@denix.org> <47CF7222.7060702@gmail.com> <20080306065513.GE7150@denix.org> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Return-path: Received: from rn-out-0910.google.com ([64.233.170.188]:18169 "EHLO rn-out-0910.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1758057AbYCFHI5 (ORCPT ); Thu, 6 Mar 2008 02:08:57 -0500 Received: by rn-out-0910.google.com with SMTP id v46so783877rnb.15 for ; Wed, 05 Mar 2008 23:08:56 -0800 (PST) In-Reply-To: <20080306065513.GE7150@denix.org> Sender: linux-ide-owner@vger.kernel.org List-Id: linux-ide@vger.kernel.org To: Denys Dmytriyenko Cc: Gabor FUNK , linux-ide@vger.kernel.org, Jim Paris , Mark Lord Denys Dmytriyenko wrote: >>> Also, few months ago instead of sata_sil24 I had my drives connected to >>> sata_mv (Supermicro 8-port) and performance was normal... >> Everything seems okay. I wonder where the difference is. Does "dd >> if=/dev/zero of=file oflags=direct bs=1M" make any difference? And can >> you vacate a raw partition and try it on there? > > oflag=direct has no effect - same speed. Tried it on a raw /dev/sda device > and still no difference. It maybe slighly better, giving me 18 MB/s. > > Can it be something with the way SiI 3124 controller is configured in the > system? Hmmm... That's strange you did specify the "bs" parameter, right? It should essentially give the same performance as "hdparm -t". I wonder where the difference comes from. -- tejun