From owner-freebsd-stable@FreeBSD.ORG Tue Feb 16 19:54:01 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 B9385106566B for ; Tue, 16 Feb 2010 19:54:01 +0000 (UTC) (envelope-from boydjd@jbip.net) Received: from mail-fx0-f226.google.com (mail-fx0-f226.google.com [209.85.220.226]) by mx1.freebsd.org (Postfix) with ESMTP id 58AA48FC0A for ; Tue, 16 Feb 2010 19:54:01 +0000 (UTC) Received: by mail-fx0-f226.google.com with SMTP id 26so6473808fxm.13 for ; Tue, 16 Feb 2010 11:54:01 -0800 (PST) MIME-Version: 1.0 Received: by 10.239.187.209 with SMTP id m17mr744834hbh.148.1266350040487; Tue, 16 Feb 2010 11:54:00 -0800 (PST) In-Reply-To: <20100216194707.GQ4648@cesium.hyperfine.info> References: <20100216194707.GQ4648@cesium.hyperfine.info> From: Joshua Boyd Date: Tue, 16 Feb 2010 14:53:40 -0500 Message-ID: <33c6b0bc1002161153u7b341868o573e6c0080a6e316@mail.gmail.com> To: "Peter C. Lai" Content-Type: text/plain; charset=ISO-8859-1 X-Content-Filtered-By: Mailman/MimeDel 2.1.5 Cc: freebsd-stable@freebsd.org Subject: Re: 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 19:54:01 -0000 http://blogs.sun.com/ahl/entry/double_parity_raid_z Looks like raidz2 is recommended for better protection against failures than 2 stripes. On Tue, Feb 16, 2010 at 2:47 PM, Peter C. Lai wrote: > 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 > =========================================================== > > _______________________________________________ > freebsd-stable@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-stable > To unsubscribe, send any mail to "freebsd-stable-unsubscribe@freebsd.org" > -- Joshua Boyd JBipNet E-mail: boydjd@jbip.net http://www.jbip.net