Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932298AbVJCPe1 (ORCPT ); Mon, 3 Oct 2005 11:34:27 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S932299AbVJCPe0 (ORCPT ); Mon, 3 Oct 2005 11:34:26 -0400 Received: from herkules.vianova.fi ([194.100.28.129]:56539 "HELO mail.vianova.fi") by vger.kernel.org with SMTP id S932298AbVJCPe0 (ORCPT ); Mon, 3 Oct 2005 11:34:26 -0400 Date: Mon, 3 Oct 2005 17:34:19 +0300 From: Ville Herva To: subbie subbie Cc: linux-kernel@vger.kernel.org Subject: Re: 3Ware 9500S-12 RAID controller -- poor performance Message-ID: <20051003143419.GF24760@viasys.com> Reply-To: vherva@vianova.fi References: <20050930065058.84446.qmail@web30315.mail.mud.yahoo.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20050930065058.84446.qmail@web30315.mail.mud.yahoo.com> X-Operating-System: Linux herkules.vianova.fi 2.4.27 User-Agent: Mutt/1.5.10i Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1715 Lines: 54 On Thu, Sep 29, 2005 at 11:50:58PM -0700, you [subbie subbie] wrote: > Dear list, > > After almost two weeks of experimentation, google > searches and reading of posts, bug reports and > discussions I'm still far from an answer. I'm hoping > someone on this list could shed some light on the > subject. Hi, We're having similar problems with 9500S-4LP and two Hitachi 250GB SATA disks. Currently we are running 2.6.12.5 and its 3w-9xxx driver. We have tried numerous 2.4 (Red Hat and kernel.org) and 2.6 kernels and 3w-9xxx drivers (kernel and 3ware.com). The results it more or less the same: on 2.4 it corrupts data and is slow, on 2.6 it doesn't corrupt data, but is slow. Our workload is VMWare GSX server. Multiple readers/writers will grind the performance to halt. We've tried: - http://216.239.59.104/search?q=cache:08R-x7y-Kn8J:xn.pinkhamster.net/blog/tech/3ware_9500_notes.html+blockdev+stra+3w-9xxx&hl=en http://www.linux-mag.com/index2.php?option=com_content&task=view&id=2033&Itemid=2304&pop=1&page=0 blockdev -setra 16384 /dev/sda - different kernel IO schedulers - parameters such as blockdev --setra 8192 /dev/vg0/root echo 300 > /sys/block/sda/queue/iosched/read_expire echo 5 > /sys/block/sda/queue/iosched/writes_starved None of this seems to make much difference. Please drop me a note if you ever get any light on this issue... -- v -- v@iki.fi - 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/