From owner-freebsd-current@FreeBSD.ORG  Thu Oct  6 12:25:39 2011
Return-Path: <owner-freebsd-current@FreeBSD.ORG>
Delivered-To: freebsd-current@freebsd.org
Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34])
	by hub.freebsd.org (Postfix) with ESMTP id 951CB1065739;
	Thu,  6 Oct 2011 12:25:39 +0000 (UTC)
	(envelope-from daniel@digsys.bg)
Received: from smtp-sofia.digsys.bg (smtp-sofia.digsys.bg [193.68.3.230])
	by mx1.freebsd.org (Postfix) with ESMTP id 0260F8FC1D;
	Thu,  6 Oct 2011 12:25:38 +0000 (UTC)
Received: from dcave.digsys.bg (dcave.digsys.bg [192.92.129.5])
	(authenticated bits=0)
	by smtp-sofia.digsys.bg (8.14.4/8.14.4) with ESMTP id p96BkF1S051778
	(version=TLSv1/SSLv3 cipher=DHE-RSA-CAMELLIA256-SHA bits=256 verify=NO);
	Thu, 6 Oct 2011 14:46:21 +0300 (EEST)
	(envelope-from daniel@digsys.bg)
Message-ID: <4E8D9136.6040200@digsys.bg>
Date: Thu, 06 Oct 2011 14:29:58 +0300
From: Daniel Kalchev <daniel@digsys.bg>
User-Agent: Mozilla/5.0 (X11; FreeBSD amd64;
	rv:6.0.2) Gecko/20110917 Thunderbird/6.0.2
MIME-Version: 1.0
To: Ivan Voras <ivoras@freebsd.org>
References: <1927112464.20111004220507@serebryakov.spb.ru>	<4E8B7A27.5070908@quip.cz>	<344794801.20111005101957@serebryakov.spb.ru>	<4E8C1426.60107@quip.cz>	<251861322.20111005125825@serebryakov.spb.ru>	<4E8C6E85.90005@quip.cz>
	<CACdU+f8mA1wLUnHVyrJwaf89ahf2oc_904=8mme7kkBLxLSCCQ@mail.gmail.com>
	<4E8CD662.90202@quip.cz> <j6k252$hpm$1@dough.gmane.org>
In-Reply-To: <j6k252$hpm$1@dough.gmane.org>
Content-Type: text/plain; charset=UTF-8; format=flowed
Content-Transfer-Encoding: 7bit
Cc: freebsd-current@freebsd.org, freebsd-geom@freebsd.org
Subject: Re: RFC: Project geom-events
X-BeenThere: freebsd-current@freebsd.org
X-Mailman-Version: 2.1.5
Precedence: list
List-Id: Discussions about the use of FreeBSD-current
	<freebsd-current.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-current>, 
	<mailto:freebsd-current-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-current>
List-Post: <mailto:freebsd-current@freebsd.org>
List-Help: <mailto:freebsd-current-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-current>,
	<mailto:freebsd-current-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Thu, 06 Oct 2011 12:25:39 -0000



On 06.10.11 14:07, Ivan Voras wrote:
>
> Um, you do realize this is a "physical" problem with metadata location
> and cannot be solved in any meaningful way? Geom_label stores its label
> in the last sector of the device, and GPT stores the "secondary" /
> backup table also at the end of the device. The two can NEVER work
> together. The same goes for any other GEOM class which stores metadata
> and GPT.

The proper way for this is to have these things store their metadata in 
the first/last sector of the provider, not the underlying device.

This means that, if you have GPT within GLABEL, for example -- you will 
only see the GPT label if you first see the GLABEL.

I guess the present situation was created out of laziness ;)