From owner-freebsd-stable Tue Jul 16 6:19: 0 2002 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 5E38037B400 for ; Tue, 16 Jul 2002 06:18:56 -0700 (PDT) Received: from maul.immure.com (ns.immure.com [207.8.42.72]) by mx1.FreeBSD.org (Postfix) with ESMTP id 753DA43E42 for ; Tue, 16 Jul 2002 06:18:55 -0700 (PDT) (envelope-from bob@immure.com) Received: (from root@localhost) by maul.immure.com (8.11.5/8.11.2) id g6GDItF22432 for freebsd-stable@freebsd.org; Tue, 16 Jul 2002 08:18:55 -0500 (CDT) (envelope-from bob@immure.com) Received: from luke.immure.com (luke.vieo.com [10.1.132.3]) by maul.immure.com (8.11.5/8.11.2) with ESMTP id g6GDIpc22182; Tue, 16 Jul 2002 08:18:51 -0500 (CDT) (envelope-from bob@immure.com) Received: (from root@localhost) by luke.immure.com (8.12.5/8.12.3) id g6GDIp23030547; Tue, 16 Jul 2002 08:18:51 -0500 (CDT) (envelope-from bob@luke.immure.com) Received: from luke.immure.com (localhost [127.0.0.1]) by luke.immure.com (8.12.5/8.12.3) with ESMTP id g6GDIpV6030522; Tue, 16 Jul 2002 08:18:51 -0500 (CDT) (envelope-from bob@luke.immure.com) Received: (from bob@localhost) by luke.immure.com (8.12.5/8.12.5/Submit) id g6GDIo5b030521; Tue, 16 Jul 2002 08:18:50 -0500 (CDT) Date: Tue, 16 Jul 2002 08:18:50 -0500 From: Bob Willcox To: "Steve O'Hara-Smith" Cc: "Greg 'groggy' Lehey" , friar_josh@webwarrior.net, jim@nasby.net, laursen@netgroup.dk, freebsd-stable@freebsd.org Subject: Re: Software raid 1 on root partition? Message-ID: <20020716131850.GB28928@luke.immure.com> Reply-To: Bob Willcox References: <25f401c228d4$a3482fb0$1a01000a@area51> <20020711091015.B51520@flake.decibel.org> <20020711200902.3653b534.steve@sohara.org> <20020713032546.GD61459@wantadilla.lemis.com> <20020713075109.06ecf02f.steve@sohara.org> <20020713100218.B284@twincat.vladsempire.net> <20020713222745.00281f72.steve@sohara.org> <20020714004247.GB16279@wantadilla.lemis.com> <20020714071524.1587f419.steve@sohara.org> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20020714071524.1587f419.steve@sohara.org> User-Agent: Mutt/1.5.1i X-scanner: scanned by Inflex 1.0.12.3 on luke.immure.com X-scanner: scanned by Inflex 0.1.5c+ on maul.immure.com Sender: owner-freebsd-stable@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.ORG On Sun, Jul 14, 2002 at 07:15:24AM +0200, Steve O'Hara-Smith wrote: > On Sun, 14 Jul 2002 10:12:47 +0930 > Greg 'groggy' Lehey wrote: > > G> On Saturday, 13 July 2002 at 22:27:45 +0200, Steve O'Hara-Smith wrote: > > G> > It seems to be about RAID on standard non-raid controllers to my > G> > poor eye. It does not mention that they will not work, only that there > G> > are boot restrictions. > G> > G> I've been reading the atacontrol man page. It's not very clear, but > G> you could be right. If so, it's a well-kept secret. There also > G> appears to be no way to recover such a RAID 1 partition. > > I've found confirmation - There was a thread in -stable around the > 18th of June (subject the new ATA driver vs. vinum) in which Bob Wilcox and > Remo Lacho both mentioned running RAID arrays on non RAID controllers using > the support in the ATA driver. > > Having RAID1 without recovery seems less than ideal though. I have been assuming (no confirmation as I haven't tried this yet) that the recovery process is to dump the file systems on the RAID1 configuration, replace the dead disk, reconfigure/newfs the filesystem, and then restore it. Certainly not ideal, but it still beats losing the data I think. The only part of this that I'm uncertain about is access to the array while one of its disks is dead. BTW, I've been running a RAID0+1 (striped and mirrored) configuration of 4 80GB IBM disks on this system for over a month now. Bob -- Bob Willcox Vital papers will demonstrate their vitality by bob@vieo.com spontaneously moving from where you left them to where Austin, TX you can't find them. To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-stable" in the body of the message