From owner-freebsd-fs@FreeBSD.ORG Sun Nov 29 17:20:27 2009 Return-Path: Delivered-To: freebsd-fs@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 5B7CC106568F for ; Sun, 29 Nov 2009 17:20:27 +0000 (UTC) (envelope-from olivier@gid0.org) Received: from mail-gx0-f214.google.com (mail-gx0-f214.google.com [209.85.217.214]) by mx1.freebsd.org (Postfix) with ESMTP id 2469D8FC13 for ; Sun, 29 Nov 2009 17:20:26 +0000 (UTC) Received: by gxk6 with SMTP id 6so669403gxk.13 for ; Sun, 29 Nov 2009 09:20:26 -0800 (PST) MIME-Version: 1.0 Received: by 10.101.175.39 with SMTP id c39mr1248362anp.87.1259515226034; Sun, 29 Nov 2009 09:20:26 -0800 (PST) In-Reply-To: <4B11C7A1.1040801@andric.com> References: <4B11C7A1.1040801@andric.com> Date: Sun, 29 Nov 2009 18:20:26 +0100 Message-ID: <367b2c980911290920x570a3164o54fb1b61a65c8189@mail.gmail.com> From: Olivier Smedts To: Dimitry Andric Content-Type: text/plain; charset=ISO-8859-1 Cc: freebsd-fs@freebsd.org Subject: Re: raidz configuration X-BeenThere: freebsd-fs@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Filesystems List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sun, 29 Nov 2009 17:20:27 -0000 2009/11/29 Dimitry Andric : > On 2009-11-28 23:22, Wes Morgan wrote: >> Simple question: >> >> 8 devices in a raidz2 >> or >> 4 devices in a raidz x 2 > > With the first configuration, any two drives can fail, and all data is > still preserved. > > With the second configuration, if two drives fail within the same RAID > set, you are screwed. A raidz on top of four zfs mirrors would be better (ie raid1+0 vs raid 0+1). > > E.g., if safety is your concern, I would definitely choose the first > configuration. :) > _______________________________________________ > freebsd-fs@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-fs > To unsubscribe, send any mail to "freebsd-fs-unsubscribe@freebsd.org" > -- Olivier Smedts _ ASCII ribbon campaign ( ) e-mail: olivier@gid0.org - against HTML email & vCards X www: http://www.gid0.org - against proprietary attachments / \ "Il y a seulement 10 sortes de gens dans le monde : ceux qui comprennent le binaire, et ceux qui ne le comprennent pas."