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Date:      Tue, 22 May 2007 13:58:43 -0500
From:      Craig Boston <craig@tobuj.gank.org>
To:        Marcel Moolenaar <xcllnt@mac.com>
Cc:        freebsd-hackers@freebsd.org, Ivan Voras <ivoras@fer.hr>
Subject:   Re: GPT boot loader?
Message-ID:  <20070522185843.GB15806@nowhere>
In-Reply-To: <947EA233-415A-4086-A965-76C6EF6A8830@mac.com>
References:  <f2u7pf$7as$1@sea.gmane.org> <20070522134224.GA15806@nowhere> <947EA233-415A-4086-A965-76C6EF6A8830@mac.com>

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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



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