From mboxrd@z Thu Jan 1 00:00:00 1970 From: Tejun Heo Subject: Re: seagate disks on sil3114 - slow? Date: Fri, 26 Oct 2007 11:32:51 +0900 Message-ID: <472151D3.6060403@gmail.com> References: <1192683290.5720.38.camel@localhost> <4716EA25.7060205@garzik.org> <1192697546.5720.51.camel@localhost> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Return-path: Received: from rv-out-0910.google.com ([209.85.198.191]:49953 "EHLO rv-out-0910.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752727AbXJZCdA (ORCPT ); Thu, 25 Oct 2007 22:33:00 -0400 Received: by rv-out-0910.google.com with SMTP id k20so654502rvb for ; Thu, 25 Oct 2007 19:33:00 -0700 (PDT) In-Reply-To: <1192697546.5720.51.camel@localhost> Sender: linux-ide-owner@vger.kernel.org List-Id: linux-ide@vger.kernel.org To: Soeren Sonnenburg Cc: Jeff Garzik , linux-ide@vger.kernel.org Soeren Sonnenburg wrote: > On Thu, 2007-10-18 at 01:07 -0400, Jeff Garzik wrote: >> Soeren Sonnenburg wrote: >>> Dear all, >>> >>> I just now realize that all disk i.o. on my machine is quite slow >>> compared with the pata disks I had before. Furthermore I recognized that >>> I only have seagates (ST3400832AS,ST3400620AS,ST3750640AS,ST3750640AS) >>> connected to a sil3114 controller. >>> >>> Being on kernel 2.6.23.1 and stumbling across >>> http://home-tj.org/wiki/index.php/Sil_m15w I am now wondering if this >>> patch made it already in kernel (or when it will make it if it is not >>> yet in/why never). >> Are you sure you have a 3114? the mod15write isn't applied to that chip. >> Does your dmesg say "applying Seagate errata fix (mod15write workaround)" ? > > At least lspci / dmesg indicates I have a 3114 ... but maybe the problem > is something else. Is there a raw device speed, readonly benchmark to > check whether things are as expected? "dd if=/dev/sdX of=/dev/null bs=1M"? Also, does changing IO scheduler to deadline make any difference? -- tejun