From owner-freebsd-stable@FreeBSD.ORG Wed Jan 18 12:51:24 2006 Return-Path: X-Original-To: freebsd-stable@freebsd.org Delivered-To: freebsd-stable@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 7BE6616A41F for ; Wed, 18 Jan 2006 12:51:24 +0000 (GMT) (envelope-from pica@biaix.org) Received: from grummit.biaix.org (86.Red-213-97-212.staticIP.rima-tde.net [213.97.212.86]) by mx1.FreeBSD.org (Postfix) with SMTP id 76D8543D55 for ; Wed, 18 Jan 2006 12:51:22 +0000 (GMT) (envelope-from pica@biaix.org) Received: (qmail 75289 invoked by uid 1000); 18 Jan 2006 12:48:10 -0000 Date: Wed, 18 Jan 2006 13:48:10 +0100 From: Joan Picanyol i Puig To: freebsd-stable@freebsd.org Message-ID: <20060118124810.GA68441@grummit.biaix.org> Mail-Followup-To: freebsd-stable@freebsd.org References: <1137532172.22430.35.camel@lanshark.dmv.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1137532172.22430.35.camel@lanshark.dmv.com> User-Agent: Mutt/1.5.9i Subject: Re: Creating a system RAID-10 device 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: Wed, 18 Jan 2006 12:51:24 -0000 * Sven Willenberger [20060117 22:06]: > over 3 mirror raid arrays that would encompass the entire filesystem > including the /boot and root partitions. > > Generally I would create a RAID10 from 6 disks as follows: > > gmirror label -v -b round-robin md1 da0 da1 > gmirror label -v -b round-robin md2 da2 da3 > gmirror label -v -b round-robin md3 da4 da5 > > gstripe label -v -s 131072 > md0 /dev/mirror/md1 /dev/mirror/md2 /dev/mirror/md3 > > newfs /dev/stripe/md0 > > naturally the problem here is that it cannot be done on a system that > booted from da0. I have seen the example of setting up a mirrored system > drive > (http://www.freebsd.org/doc/en_US.ISO8859-1/books/handbook/geom-mirror.html ) > > which won't quite work for my case either. Using this method I could > probably get the one mirror (md1) to work, but I know of no way of then > adding the other 2 mirror sets and then redoing the system to stripe > across all 3 mirrored sets. Uhm. The problem is that you can't mount the root fs from a striped partition. Create an extra slice on each drive and either configure a 6-way mirror or a mirror-of-3-sripes to boot from. > The only thing I could think of was to boot from the livecd and create > the 6-disk array and then trying to install FreeBSD onto this > filesystem. In order to do this the installer would have to > recognize /dev/stripe/md0 as a valid "drive" -- is there any way to have > this happen? I don't believe sysinstall is smart enough, but you can always use the install.sh scripts on the distribution. However, the above still aplies. qvb -- pica