From owner-freebsd-geom@FreeBSD.ORG Mon Aug 28 13:48:01 2006 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 91A3D16A4F4 for ; Mon, 28 Aug 2006 13:48:01 +0000 (UTC) (envelope-from awatts@pett.com.au) Received: from mail.equard.com.au (mail.equard.com.au [150.101.96.125]) by mx1.FreeBSD.org (Postfix) with ESMTP id D231C43D46 for ; Mon, 28 Aug 2006 13:48:00 +0000 (GMT) (envelope-from awatts@pett.com.au) Received: from pett.com.au ([172.24.169.71]) by mail.equard.com.au (8.13.6.20060614/8.13.6) with ESMTP id k7SDlw41043372; Mon, 28 Aug 2006 23:17:58 +0930 (CST) (envelope-from awatts@pett.com.au) Message-ID: <44F2F3C5.7090001@pett.com.au> Date: Mon, 28 Aug 2006 23:16:45 +0930 From: Alastair Watts User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-GB; rv:1.6) Gecko/20040113 X-Accept-Language: en-au, en-us, en MIME-Version: 1.0 To: "R. B. Riddick" References: <20060828132846.81472.qmail@web30308.mail.mud.yahoo.com> In-Reply-To: <20060828132846.81472.qmail@web30308.mail.mud.yahoo.com> X-Enigmail-Version: 0.83.6.0 X-Enigmail-Supports: pgp-inline, pgp-mime Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit Cc: freebsd-geom@freebsd.org Subject: Re: gvinum behaviour on disk failure 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: Mon, 28 Aug 2006 13:48:01 -0000 R. B. Riddick wrote: > Yes. Out of my theoretically modell, I have of FBSD in my brain there are at > least 2 possibilities: > > 1. use a partition/slice of the larger disk (bsdlabel... or fdisk...) Will gmirror work with slices? I thought it worked on the physical drive layer.. > and > 2. just use gmirror and hope that it build the minimum of both sizes (which it > does actually I think; so u do not have to hope very much...)... Haven't tried that, but have wondered if it will work. I guess you would have to use the smaller of the drives as the initial drive to base the mirror on. >>Yes... I noticed gvinum was very different to Greg's original vinum >>suite ;) But this seems to be a fundamental thing that's missing from >>gvinum - the ability to recover from a drive failure and to be able to >>service the request from a different plex. > > Hmm... Does gmirror overcome these drawbacks? Don't know. If it doesn't then it's still a problem in my opinion :) We have more machines using gmirror than gvinum (only 1 with gvinum), but so far only the machine with gvinum has had a drive fail since FBSD 5.3 upwards. I'd still like to hear from someone who knows the insides of gvinum as to their opinion on the earlier reported incident. Cheers, Al