Date: Tue, 12 Jun 2007 11:57:55 +0100 From: Rui Paulo <rpaulo@fnop.net> To: Chuck Swiger <cswiger@mac.com> Cc: freebsd-hackers@freebsd.org, Marcel Moolenaar <xcllnt@mac.com>, freebsd-current@freebsd.org, freebsd-geom@freebsd.org Subject: Re: GPT - (last) call for action Message-ID: <86ir9txwwc.wl%rpaulo@fnop.net> In-Reply-To: <EED5019B-C141-454A-8C5C-6F5E9A294FD8@mac.com> References: <f4ek4o$i4u$1@sea.gmane.org> <4AB3C4C0-0DA1-482F-A4CD-375A53332F29@mac.com> <f4f14d$lhe$1@sea.gmane.org> <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> <B76664DB-2AC5-4196-979A-EF6E36FAFDCD@mac.com> <86lkeqxo89.wl%rpaulo@fnop.net> <EED5019B-C141-454A-8C5C-6F5E9A294FD8@mac.com>
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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
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