From owner-freebsd-geom@FreeBSD.ORG Sun Oct 9 17:36:45 2005 Return-Path: X-Original-To: freebsd-geom@FreeBSD.org Delivered-To: freebsd-geom@FreeBSD.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 0FB1616A41F; Sun, 9 Oct 2005 17:36:45 +0000 (GMT) (envelope-from aw1@stade.co.uk) Received: from lon-mail-2.gradwell.net (lon-mail-2.gradwell.net [193.111.201.126]) by mx1.FreeBSD.org (Postfix) with ESMTP id 0F14143D45; Sun, 9 Oct 2005 17:36:43 +0000 (GMT) (envelope-from aw1@stade.co.uk) Received: from alsager-adsl.stade.co.uk ([81.6.222.119] helo=access2.hanley.stade.co.uk) by lon-mail-2.gradwell.net with esmtp (Gradwell gwh-smtpd 1.192) id 4349552a.76f3.11b0; Sun, 9 Oct 2005 18:36:42 +0100 (envelope-sender ) Received: from titus.hanley.stade.co.uk (titus [192.168.1.5]) by access2.hanley.stade.co.uk (8.13.4/8.13.3) with ESMTP id j99Hafpr000933; Sun, 9 Oct 2005 18:36:41 +0100 (BST) (envelope-from aw1@titus.hanley.stade.co.uk) Received: from titus.hanley.stade.co.uk (localhost [127.0.0.1]) by titus.hanley.stade.co.uk (8.12.11/8.12.11) with ESMTP id j99HafLN093979; Sun, 9 Oct 2005 18:36:41 +0100 (BST) (envelope-from aw1@titus.hanley.stade.co.uk) Received: (from aw1@localhost) by titus.hanley.stade.co.uk (8.12.11/8.12.11/Submit) id j99HaeGq093978; Sun, 9 Oct 2005 18:36:40 +0100 (BST) (envelope-from aw1) Date: Sun, 9 Oct 2005 18:36:40 +0100 From: Adrian Wontroba To: Pawel Jakub Dawidek Message-ID: <20051009183640.A93357@titus.hanley.stade.co.uk> References: <20051006125233.754dd00e.josh@oplink.net> <86r7aywju7.fsf@xps.des.no> <20051006200802.GL564@ratchet.nebcorp.com> <20051006201616.GE26614@garage.freebsd.pl> <20051006202700.GM564@ratchet.nebcorp.com> <20051008023521.D55180@titus.hanley.stade.co.uk> <20051008065751.GC1000@garage.freebsd.pl> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: Mutt/1.2i In-Reply-To: <20051008065751.GC1000@garage.freebsd.pl>; from pjd@FreeBSD.org on Sat, Oct 08, 2005 at 08:57:51AM +0200 X-Operating-System: FreeBSD 4.10-STABLE Organization: Oh dear, I've joined one again. X-Virus-Scanned: ClamAV version 0.86.1, clamav-milter version 0.86 on access2.hanley.stade.co.uk X-Virus-Status: Clean Cc: freebsd-geom@FreeBSD.org Subject: Re: GEOM's RAID level support X-BeenThere: freebsd-geom@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list Reply-To: aw1@stade.co.uk List-Id: GEOM-specific discussions and implementations List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sun, 09 Oct 2005 17:36:45 -0000 On Sat, Oct 08, 2005 at 08:57:51AM +0200, Pawel Jakub Dawidek wrote: > On Sat, Oct 08, 2005 at 02:35:21AM +0100, Adrian Wontroba wrote: > +> mirror/gm0 COMPLETE ad4a > +> ad6a > +> ad8a > +> ad10a > > Isn't that waste of space? Yes, but it isn't a lot of space (1 GB on each of four 150 GB disks), and it gives me the comfort blanket of being able to boot from any disk. > +> At work, I've developed a makefile based version of RSE's "single disk > +> to two disk" approach. If there is any interest, I'll ask my boss if I > +> can release it. > Nice idea, but I think at this point it is too much specific for you > configuration. It'd be much useful when it will be more general somehow. The makefile I produced at work is much more general. Provided the first disk is no larger than the second, and contains a single *s1 slice, it will build an two disk system equivalent to the first, with the same partition sizes. It also has a fall back for the "almost the same size but different geometry" gotcha. I hate this ancient CHS cruft. It is being used soon after sysinstall by UNIX novices. Of course, it will probably be totally redundant once Craig makes sysinstall GEOM aware. -- Adrian Wontroba