From owner-freebsd-stable@FreeBSD.ORG Tue Feb 16 19:47:11 2010 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 37E3F1065781 for ; Tue, 16 Feb 2010 19:47:11 +0000 (UTC) (envelope-from peter@simons-rock.edu) Received: from hedwig.simons-rock.edu (hedwig.simons-rock.edu [208.81.88.14]) by mx1.freebsd.org (Postfix) with ESMTP id 1393A8FC12 for ; Tue, 16 Feb 2010 19:47:10 +0000 (UTC) Received: from cesium.hyperfine.info (c2.8d.5646.static.theplanet.com [70.86.141.194]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by hedwig.simons-rock.edu (Postfix) with ESMTP id E189A2BB341 for ; Tue, 16 Feb 2010 14:47:09 -0500 (EST) Date: Tue, 16 Feb 2010 14:47:08 -0500 From: "Peter C. Lai" To: freebsd-stable@freebsd.org Message-ID: <20100216194707.GQ4648@cesium.hyperfine.info> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: Mutt/1.5.17 (2007-11-01) Subject: raidz/2 stripe widths 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: Tue, 16 Feb 2010 19:47:11 -0000 Which one might be "better" on pool that will consist of 6 disks: 6x raidz2 or 2 stripes of 3 disks in raidz? It should provide slightly less reliability (still allows for 2 disks to be off the array at a time) but the latter should improve reads since a given read only has to touch 3 spindles at a time instead of 5? -- =========================================================== Peter C. Lai | Bard College at Simon's Rock Systems Administrator | 84 Alford Rd. Information Technology Svcs. | Gt. Barrington, MA 01230 USA peter AT simons-rock.edu | (413) 528-7428 ===========================================================