From owner-freebsd-stable@FreeBSD.ORG Sat Aug 18 01:41:13 2007 Return-Path: Delivered-To: freebsd-stable@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 270BB16A420 for ; Sat, 18 Aug 2007 01:41:13 +0000 (UTC) (envelope-from vivek@khera.org) Received: from yertle.kcilink.com (thingy.kcilink.com [74.92.149.59]) by mx1.freebsd.org (Postfix) with ESMTP id F108613C491 for ; Sat, 18 Aug 2007 01:41:12 +0000 (UTC) (envelope-from vivek@khera.org) Received: from [192.168.135.92] (unknown [192.168.135.92]) by yertle.kcilink.com (Postfix) with ESMTP id 2CC7CB80D for ; Fri, 17 Aug 2007 21:41:12 -0400 (EDT) Mime-Version: 1.0 (Apple Message framework v752.2) In-Reply-To: <20575075@bsam.ru> References: <31BB09D7-B58A-47AC-8DD1-6BB8141170D8@khera.org> <20575075@bsam.ru> Content-Type: text/plain; charset=US-ASCII; delsp=yes; format=flowed Message-Id: Content-Transfer-Encoding: 7bit From: Vivek Khera Date: Fri, 17 Aug 2007 21:41:11 -0400 To: FreeBSD Stable X-Mailer: Apple Mail (2.752.2) Subject: Re: large RAID volume partition strategy X-BeenThere: freebsd-stable@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Production branch of FreeBSD source code List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sat, 18 Aug 2007 01:41:13 -0000 On Aug 17, 2007, at 6:26 PM, Boris Samorodov wrote: > I have 6 SATA-II 300MB/s disks at 3WARE adapter. My (very!) simple > tests gave about 170MB/s for dd. BTW, I tested (OK, very fast) > RAID5, RAID6, gmirror+gstripe and noone get close to RAID10. (Well, as > expected, I suppose). Whichever RAID level I choose, I still need to decide how to split the 6.5Tb into smaller hunks. In any case, my testing with RAID10, RAID5, and RAID6 showed marginal differences with my workload.