Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1750739AbVJJKy1 (ORCPT ); Mon, 10 Oct 2005 06:54:27 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1750744AbVJJKy1 (ORCPT ); Mon, 10 Oct 2005 06:54:27 -0400 Received: from zeniv.linux.org.uk ([195.92.253.2]:11978 "EHLO ZenIV.linux.org.uk") by vger.kernel.org with ESMTP id S1750739AbVJJKy0 (ORCPT ); Mon, 10 Oct 2005 06:54:26 -0400 Date: Mon, 10 Oct 2005 11:54:23 +0100 From: "Dr. David Alan Gilbert" To: subbie subbie Cc: Jon Burgess , linux-kernel@vger.kernel.org Subject: Re: 3Ware 9500S-12 RAID controller -- poor performance Message-ID: <20051010105423.GA11982@gallifrey> References: <4346EA35.90700@uklinux.net> <20051010104217.20341.qmail@web30305.mail.mud.yahoo.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20051010104217.20341.qmail@web30305.mail.mud.yahoo.com> User-Agent: Mutt/1.4.1i X-Chocolate: 70 percent or better cocoa solids preferably X-Operating-System: Linux/2.6.11-1.14_FC3 (i686) X-Uptime: 11:51:46 up 37 days, 23:18, 38 users, load average: 0.06, 0.04, 0.00 Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1204 Lines: 31 * subbie subbie (subbie_subbie@yahoo.com) wrote: > OK, > > I now dumped RAID5 and am running all of my 12 disks > separately each partitioned with XFS. > > > I did a very crude test of reading a single 1GB file > from each of my disks in parallel by putting 12 dd > processes into the background. Each file was read at > approximately 35MB/s giving an aggragate of a little > over 400MB/s. According to 3Ware support, 400MB/s is > the "theoretical maximum" of this controller. I'm > very happy with these results. Nice. Have you tried Software RAID5 on top of that? I would be very interested to know how software RAID5 goes relative to the 3Ware hardware. Dave -- -----Open up your eyes, open up your mind, open up your code ------- / Dr. David Alan Gilbert | Running GNU/Linux on Alpha,68K| Happy \ \ gro.gilbert @ treblig.org | MIPS,x86,ARM,SPARC,PPC & HPPA | In Hex / \ _________________________|_____ http://www.treblig.org |_______/ - 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/