From owner-freebsd-geom@FreeBSD.ORG  Fri Nov 12 19:04:31 2004
Return-Path: <owner-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 5487116A4CE; Fri, 12 Nov 2004 19:04:31 +0000 (GMT)
Received: from smtp.isometry.net (smtp.isometry.net [195.137.51.154])
	by mx1.FreeBSD.org (Postfix) with SMTP
	id F228E43D54; Fri, 12 Nov 2004 19:04:29 +0000 (GMT)
	(envelope-from robin+spam@isometry.net)
Received: from [127.0.0.1] (ishadow.isometry.net [195.137.51.150])
	by smtp.isometry.net (Postfix) with ESMTP id A088E57;
	Fri, 12 Nov 2004 19:04:21 +0000 (UTC)
Message-ID: <41950935.2010103@isometry.net>
Date: Fri, 12 Nov 2004 19:04:21 +0000
From: Robin Breathe <robin+spam@isometry.net>
User-Agent: Mozilla Thunderbird 0.9+ (Windows/20041107)
X-Accept-Language: en-us, en
MIME-Version: 1.0
To: Pawel Jakub Dawidek <pjd@FreeBSD.org>, freebsd-geom@FreeBSD.org
References: <200411081140.57792.michael.riexinger@de.clara.net>
	<20041108120513.GH11057@calleigh.elde.net>
	<20041108124606.GC8120@darkness.comp.waw.pl>
	<200411081540.05593.michael.riexinger@de.clara.net>
	<20041108164540.GF8120@darkness.comp.waw.pl>
In-Reply-To: <20041108164540.GF8120@darkness.comp.waw.pl>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Content-Transfer-Encoding: 7bit
cc: Terje Elde <terje+geom@elde.net>
Subject: Re: gmirror problems
X-BeenThere: freebsd-geom@freebsd.org
X-Mailman-Version: 2.1.1
Precedence: list
List-Id: GEOM-specific discussions and implementations
	<freebsd-geom.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-geom>,
	<mailto:freebsd-geom-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-geom>
List-Post: <mailto:freebsd-geom@freebsd.org>
List-Help: <mailto:freebsd-geom-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-geom>,
	<mailto:freebsd-geom-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Fri, 12 Nov 2004 19:04:31 -0000

Pawel Jakub Dawidek wrote:
> Unfortunately, gmirror and other GEOM classes are not supported by our
> installer.
> 
> The safest way to do what you want is to:
> 
> 	# gmirror label <name> ad1
> 	create slices and partitions on /dev/mirror/<name>
> 	create file system
> 	copy data from ad0 to <name>
> 	change /etc/fstab to boot from /dev/mirror/<name>s1a or something
> 	reboot
> 	# gmirror insert <name> ad0

Are any nasty side-effects likely from slicing and newfs-ing ad1 prior 
to labelling the mirror? For example, could the gmirror metadata get 
overwritten at some later stage by writing to the end of the last slice?

Robin