From owner-freebsd-hackers@FreeBSD.ORG Tue May 22 18:34:26 2007 Return-Path: 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 9733A16A400 for ; Tue, 22 May 2007 18:34:26 +0000 (UTC) (envelope-from xcllnt@mac.com) Received: from smtpout.mac.com (smtpout.mac.com [17.250.248.183]) by mx1.freebsd.org (Postfix) with ESMTP id 81AC113C45D for ; Tue, 22 May 2007 18:34:26 +0000 (UTC) (envelope-from xcllnt@mac.com) Received: from mac.com (smtpin08-en2 [10.13.10.153]) by smtpout.mac.com (Xserve/smtpout13/MantshX 4.0) with ESMTP id l4MIYMpG025586; Tue, 22 May 2007 11:34:22 -0700 (PDT) Received: from [172.24.104.227] (natint3.juniper.net [66.129.224.36]) (authenticated bits=0) by mac.com (Xserve/smtpin08/MantshX 4.0) with ESMTP id l4MIYC1O003220 (version=TLSv1/SSLv3 cipher=AES128-SHA bits=128 verify=NO); Tue, 22 May 2007 11:34:15 -0700 (PDT) In-Reply-To: <20070522134224.GA15806@nowhere> References: <20070522134224.GA15806@nowhere> Mime-Version: 1.0 (Apple Message framework v752.3) Content-Type: text/plain; charset=US-ASCII; delsp=yes; format=flowed Message-Id: <947EA233-415A-4086-A965-76C6EF6A8830@mac.com> Content-Transfer-Encoding: 7bit From: Marcel Moolenaar Date: Tue, 22 May 2007 14:34:02 -0400 To: Craig Boston X-Mailer: Apple Mail (2.752.3) X-Brightmail-Tracker: AAAAAA== X-Brightmail-scanned: yes Cc: freebsd-hackers@freebsd.org, Ivan Voras 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 List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 22 May 2007 18:34:26 -0000 On May 22, 2007, at 9:42 AM, Craig Boston wrote: > On Tue, May 22, 2007 at 09:57:34AM +0200, Ivan Voras wrote: >> and that the fields in the GPT are supposed to be disk-absolute >> (which >> is not a problem on FreeBSD but may be on other systems). > > Grrr, this is one design "feature" of BSD disklabels that I was hoping > might finally go away. But it seems the GPT designers made the same > mistake :( 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. 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. FYI, -- Marcel Moolenaar xcllnt@mac.com