From owner-freebsd-stable@FreeBSD.ORG Wed May 11 09:51:45 2005 Return-Path: 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 7C1EB16A4CE for ; Wed, 11 May 2005 09:51:45 +0000 (GMT) Received: from mail.zrz.tu-berlin.de (mail.zrz.TU-Berlin.DE [130.149.4.15]) by mx1.FreeBSD.org (Postfix) with ESMTP id 0E67C43D68 for ; Wed, 11 May 2005 09:51:44 +0000 (GMT) (envelope-from petero@itp.physik.tu-berlin.de) Received: from localhost ([127.0.0.1] helo=mail.zrz.TU-Berlin.DE) by mail.zrz.tu-berlin.de with esmtp (exim-4.51) for id 1DVnsU-0006jH-Lj; Wed, 11 May 2005 11:51:42 +0200 Received: from mail.zrz.TU-Berlin.DE ([130.149.4.15]) by mail.zrz.TU-Berlin.DE (MailMonitor for SMTP v1.2.2 ) ; Wed, 11 May 2005 11:51:42 +0200 (CEST) Received: from ella.physik.tu-berlin.de ([130.149.114.172]) by mail.zrz.tu-berlin.de with esmtp (exim-4.51) for id 1DVnsU-0006iy-Kj; Wed, 11 May 2005 11:51:42 +0200 Received: from ella.physik.tu-berlin.de (localhost [127.0.0.1]) j4B9pgPg013026 for ; Wed, 11 May 2005 11:51:42 +0200 (CEST) (envelope-from petero@ella.physik.tu-berlin.de) Received: (from petero@localhost) by ella.physik.tu-berlin.de (8.13.1/8.13.1/Submit) id j4B9pgLk013025 for freebsd-stable@freebsd.org; Wed, 11 May 2005 11:51:42 +0200 (CEST) (envelope-from petero) Date: Wed, 11 May 2005 11:51:42 +0200 From: Peter Orlowski To: freebsd-stable@freebsd.org Message-ID: <20050511095142.GA12629@ella.physik.tu-berlin.de> References: <8b6eae96050510071037d3b6e4@mail.gmail.com> <4280C277.4030904@jim-liesl.org> <27C1250C-9BFD-4FA8-876C-09DF5504B058@isncom.com> <4280EE3C.8050505@jim-liesl.org> Mime-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: <4280EE3C.8050505@jim-liesl.org> User-Agent: Mutt/1.4.2.1i X-Virus-Scanned: Sophos MailMonitor on mail.zrz.tu-berlin.de; Wed, 11 May 2005 11:51:42 +0200 Subject: Re: State of gvinum RELENG_5 or RELENG_5_4 ?! X-BeenThere: freebsd-stable@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list Reply-To: peter.orlowski@physik.tu-berlin.de List-Id: Production branch of FreeBSD source code List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 11 May 2005 09:51:45 -0000 On Tue, May 10, 2005 at 11:24:12AM -0600, secmgr wrote: > Gabor Esperon wrote: > > > >How reliable is the gmirror subsystem? > > gmirror seems fine as best as I can tell. I've been running it for a > few months on sata drives. I had gmirror running on two IDE drives for system and two SATA drives for user data. That was RELENG_5_3. When one of the SATA drives broke (later I got errors like ad4: FAILURE - READ_DMA status=51 on fscking) the whole system just stopped. I could switch consoles but nothing else. Nothing in the logs either. I believe it had lost all it's file systems. After power cycling, both mirrors were found but marked as broken. Gmirror chose the defective SATA disk as the intact one and started rebuilding the mirror from that - but fscking the mirror failed, obviously, so I ended up with one disk that was broken, but marked intact by gmirror and one disk the other way round. I had to erase the gmirror metadata on the intact disk to get it to work again. I'd say gmirror will save your data but it won't save you from some downtime... Greetings, Peter -- Peter Orlowski Institut für Theoretische Physik Technische Universität Berlin