From owner-freebsd-hackers@FreeBSD.ORG  Tue May 22 18:58:52 2007
Return-Path: <owner-freebsd-hackers@FreeBSD.ORG>
X-Original-To: freebsd-hackers@freebsd.org
Delivered-To: freebsd-hackers@freebsd.org
Received: from mx1.freebsd.org (mx1.freebsd.org [69.147.83.52])
	by hub.freebsd.org (Postfix) with ESMTP id 8ED0516A469
	for <freebsd-hackers@freebsd.org>; Tue, 22 May 2007 18:58:52 +0000 (UTC)
	(envelope-from craig@tobuj.gank.org)
Received: from ion.gank.org (ion.gank.org [69.55.238.164])
	by mx1.freebsd.org (Postfix) with ESMTP id 7A90013C45E
	for <freebsd-hackers@freebsd.org>; Tue, 22 May 2007 18:58:50 +0000 (UTC)
	(envelope-from craig@tobuj.gank.org)
Received: by ion.gank.org (Postfix, from userid 1001)
	id 2167011245; Tue, 22 May 2007 13:58:50 -0500 (CDT)
Date: Tue, 22 May 2007 13:58:43 -0500
From: Craig Boston <craig@tobuj.gank.org>
To: Marcel Moolenaar <xcllnt@mac.com>
Message-ID: <20070522185843.GB15806@nowhere>
Mail-Followup-To: Craig Boston <craig@tobuj.gank.org>,
	Marcel Moolenaar <xcllnt@mac.com>, freebsd-hackers@freebsd.org,
	Ivan Voras <ivoras@fer.hr>
References: <f2u7pf$7as$1@sea.gmane.org> <20070522134224.GA15806@nowhere>
	<947EA233-415A-4086-A965-76C6EF6A8830@mac.com>
Mime-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
In-Reply-To: <947EA233-415A-4086-A965-76C6EF6A8830@mac.com>
User-Agent: Mutt/1.4.2.2i
Cc: freebsd-hackers@freebsd.org, Ivan Voras <ivoras@fer.hr>
Subject: Re: GPT boot loader?
X-BeenThere: freebsd-hackers@freebsd.org
X-Mailman-Version: 2.1.5
Precedence: list
List-Id: Technical Discussions relating to FreeBSD
	<freebsd-hackers.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-hackers>, 
	<mailto:freebsd-hackers-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-hackers>
List-Post: <mailto:freebsd-hackers@freebsd.org>
List-Help: <mailto:freebsd-hackers-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-hackers>,
	<mailto:freebsd-hackers-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Tue, 22 May 2007 18:58:52 -0000

On Tue, May 22, 2007 at 02:34:02PM -0400, Marcel Moolenaar wrote:
> GPT is not designed to be a sub-partitioning scheme. It can not be
> used within a partition. As such, absolute block addresses are the
> same as relative block addresses. As such, no mistake has been made
> yet.

Ah, that does make sense.  Does the GPT specification actually say
absolute block addresses?  That would seem to be redundant if the spec
also forbids its use inside a partition.  I can't seem to find the
actual documents for GPT anywhere.

> FreeBSD actually creates a GPT with relative addresses, which means
> that if we allow it to be used to sub-partition partitions, it would
> not have the same problem as the BSD label.

I suppose we're being nonstandard either way, so I'll keep my fingers
crossed that this continues to be the case :)

Thanks for the clarification.

Craig