From owner-freebsd-hackers@FreeBSD.ORG Tue Jun 12 10:57:59 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 E4A6B16A468; Tue, 12 Jun 2007 10:57:59 +0000 (UTC) (envelope-from rpaulo@fnop.net) Received: from core.fnop.net (mx.fnop.net [82.102.11.82]) by mx1.freebsd.org (Postfix) with ESMTP id 6A61A13C489; Tue, 12 Jun 2007 10:57:59 +0000 (UTC) (envelope-from rpaulo@fnop.net) Received: from core.fnop.net (mx.fnop.net [82.102.11.82]) by core.fnop.net (Postfix) with ESMTP id F0ABE690A85; Tue, 12 Jun 2007 11:55:07 +0100 (WEST) Received: by core.fnop.net (Postfix, from userid 1015) id BD626690AC5; Tue, 12 Jun 2007 11:55:07 +0100 (WEST) X-Spam-Checker-Version: SpamAssassin 3.1.7 (2006-10-05) on core.fnop.net X-Spam-Level: X-Spam-Status: No, score=-0.5 required=5.0 tests=AWL,BAYES_00, FORGED_RCVD_HELO,RCVD_IN_SORBS_DUL autolearn=no version=3.1.7 Received: from epsilon.local.fnop.net (87-196-89-95.net.novis.pt [87.196.89.95]) by core.fnop.net (Postfix) with ESMTP id 31ACE690A85; Tue, 12 Jun 2007 11:55:07 +0100 (WEST) Date: Tue, 12 Jun 2007 11:57:55 +0100 Message-ID: <86ir9txwwc.wl%rpaulo@fnop.net> From: Rui Paulo To: Chuck Swiger In-Reply-To: References: <4AB3C4C0-0DA1-482F-A4CD-375A53332F29@mac.com> <4D7CDA24-48FE-4319-A320-C8D7165E9EBC@mac.com> <200706092128.l59LSjRs027671@apollo.backplane.com> <57F8CCC1-1841-41AE-9F82-0C87FE53BE99@mac.com> <200706101752.l5AHqdE0035954@apollo.backplane.com> <8B01C1EC-D61A-484F-B308-6D6C8EB00EE6@mac.com> <861wgjwnrw.wl%rpaulo@fnop.net> <200706102143.l5ALhQut038340@apollo.backplane.com> <86zm37v4ns.wl%rpaulo@fnop.net> <86lkeqxo89.wl%rpaulo@fnop.net> User-Agent: Wanderlust/2.15.5 (Almost Unreal) Emacs/21.3 Mule/5.0 (SAKAKI) X-cite-me: rpaulo MIME-Version: 1.0 (generated by SEMI 1.14.6 - "Maruoka") Content-Type: text/plain; charset=US-ASCII X-Virus-Scanned: ClamAV using ClamSMTP X-Mailman-Approved-At: Tue, 12 Jun 2007 11:26:48 +0000 Cc: freebsd-hackers@freebsd.org, Marcel Moolenaar , freebsd-current@freebsd.org, freebsd-geom@freebsd.org Subject: Re: GPT - (last) call for action 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, 12 Jun 2007 10:58:00 -0000 At Mon, 11 Jun 2007 13:12:04 -0700, Chuck Swiger wrote: > > If you ever use it, fdisk /dev/rdisk0 will show things differently. > > The first partition with id 0xEE will should start at LBA 40 and end > > at LBA 409640. > > OK: although that surprises me a bit, perhaps trying to get Windows > XP (which may not understand the ~32 sector GPT header+table) means > that claiming the first partition in the MBR starts at 40 works > better...? Well, yes. I think it's like a safe keeping issue so that the user doesn't overwrite the GPT info. > > >> The first, small partition is almost certainly a "boothfs" boot > >> partition, as described in the man page for Apple's version of > >> fdisk: > > > > I don't think so. > > The boothfs partition doesn't seem to be used on Intel Macs no > > longer. The EFI boot loader that comes with Intel Macs can read HFS+ > > without any help (actually it's an EFI module), so bootufs/boothfs > > partitions are no longer required. > > It looks like you're right-- the OS-X formatting utilities still > reserve space for the boot partition, but they just scribble enough > to this space to indicate that the partition isn't actually bootable: > > # dd if=/dev/disk0s1 bs=512 count=409600 | hexdump -C Yes, this partition is just FAT32 without anything in it. -- Rui Paulo