From owner-freebsd-geom@FreeBSD.ORG Tue Jun 16 19:05:07 2009 Return-Path: Delivered-To: freebsd-geom@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id EFDEE106566B for ; Tue, 16 Jun 2009 19:05:07 +0000 (UTC) (envelope-from peterjeremy@optushome.com.au) Received: from fallbackmx09.syd.optusnet.com.au (fallbackmx09.syd.optusnet.com.au [211.29.132.242]) by mx1.freebsd.org (Postfix) with ESMTP id B58F88FC1E for ; Tue, 16 Jun 2009 19:05:02 +0000 (UTC) (envelope-from peterjeremy@optushome.com.au) Received: from mail12.syd.optusnet.com.au (mail12.syd.optusnet.com.au [211.29.132.193]) by fallbackmx09.syd.optusnet.com.au (8.13.1/8.13.1) with ESMTP id n5GIrvC4024873 for ; Wed, 17 Jun 2009 04:53:57 +1000 Received: from server.vk2pj.dyndns.org (c122-106-216-167.belrs3.nsw.optusnet.com.au [122.106.216.167]) by mail12.syd.optusnet.com.au (8.13.1/8.13.1) with ESMTP id n5GIqNnA011108 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO); Wed, 17 Jun 2009 04:53:08 +1000 X-Bogosity: Ham, spamicity=0.000000 Received: from server.vk2pj.dyndns.org (localhost.vk2pj.dyndns.org [127.0.0.1]) by server.vk2pj.dyndns.org (8.14.3/8.14.3) with ESMTP id n5GIqMeK067320; Wed, 17 Jun 2009 04:52:22 +1000 (EST) (envelope-from peter@server.vk2pj.dyndns.org) Received: (from peter@localhost) by server.vk2pj.dyndns.org (8.14.3/8.14.3/Submit) id n5GIqM3e067317; Wed, 17 Jun 2009 04:52:22 +1000 (EST) (envelope-from peter) Date: Wed, 17 Jun 2009 04:52:21 +1000 From: Peter Jeremy To: Dan Naumov Message-ID: <20090616185221.GI9529@server.vk2pj.dyndns.org> References: MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="+Z7/5fzWRHDJ0o7Q" Content-Disposition: inline In-Reply-To: X-PGP-Key: http://members.optusnet.com.au/peterjeremy/pubkey.asc User-Agent: Mutt/1.5.19 (2009-01-05) Cc: freebsd-fs@freebsd.org, freebsd-geom@freebsd.org Subject: Re: Does this disk/filesystem layout look sane to you? X-BeenThere: freebsd-geom@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: GEOM-specific discussions and implementations List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 16 Jun 2009 19:05:08 -0000 --+Z7/5fzWRHDJ0o7Q Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On 2009-Jun-14 19:16:22 +0300, Dan Naumov wrote: >Is there any actual downside to having a 5-way mirror vs a 2-way or a 3-wa= y one? Only write performance to the UFS root filesystem. I run a system using a similar approach (though across 3 disks). My only suggestion would be that instead of a single 5-way mirrored root, you have a 2- or 3-way mirrored root and an off-line root backup using the remaining disks - if you accidently trash your active root, you can just boot off one of the other disks to recover. --=20 Peter Jeremy --+Z7/5fzWRHDJ0o7Q Content-Type: application/pgp-signature Content-Disposition: inline -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.11 (FreeBSD) iEYEARECAAYFAko36eUACgkQ/opHv/APuIeeJQCfUt1mb4iCQonTgVOBWQGcVJ8d JW4AnR1DKOrDCf8O5/+B6uGAvDVeFRJ4 =SloR -----END PGP SIGNATURE----- --+Z7/5fzWRHDJ0o7Q--