From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mailman by lists.gnu.org with archive (Exim 4.43) id 1MYRQZ-0003SS-Va for mharc-grub-devel@gnu.org; Tue, 04 Aug 2009 17:20:12 -0400 Received: from mailman by lists.gnu.org with tmda-scanned (Exim 4.43) id 1MYRQY-0003Rw-NU for grub-devel@gnu.org; Tue, 04 Aug 2009 17:20:10 -0400 Received: from exim by lists.gnu.org with spam-scanned (Exim 4.43) id 1MYRQT-0003Q1-Ha for grub-devel@gnu.org; Tue, 04 Aug 2009 17:20:09 -0400 Received: from [199.232.76.173] (port=54712 helo=monty-python.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1MYRQT-0003Py-A8 for grub-devel@gnu.org; Tue, 04 Aug 2009 17:20:05 -0400 Received: from xvm-190-8.ghst.net ([217.70.190.8]:53092 helo=aybabtu.com) by monty-python.gnu.org with esmtps (TLS-1.0:RSA_AES_256_CBC_SHA1:32) (Exim 4.60) (envelope-from ) id 1MYRQT-0007xy-1g for grub-devel@gnu.org; Tue, 04 Aug 2009 17:20:05 -0400 Received: from [192.168.10.10] (helo=thorin) by aybabtu.com with esmtp (Exim 4.69) (envelope-from ) id 1MYRQP-00058L-Nf for grub-devel@gnu.org; Tue, 04 Aug 2009 23:20:02 +0200 Received: from rmh by thorin with local (Exim 4.69) (envelope-from ) id 1MYRQJ-0000DX-V4 for grub-devel@gnu.org; Tue, 04 Aug 2009 23:19:55 +0200 Date: Tue, 4 Aug 2009 23:19:55 +0200 From: Robert Millan To: The development of GRUB 2 Message-ID: <20090804211955.GA16346@thorin> References: <1248617131.25072.13.camel@fz.local> <20090728181234.GI32726@thorin> <1248857003.3729.0.camel@fz.local> <20090731160546.GF14675@thorin> <1249057611.3635.11.camel@fz.local> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1249057611.3635.11.camel@fz.local> Organization: free as in freedom X-Message-Flag: Worried about Outlook viruses? Switch to Thunderbird! www.mozilla.com/thunderbird X-Debbugs-No-Ack: true User-Agent: Mutt/1.5.18 (2008-05-17) X-detected-operating-system: by monty-python.gnu.org: GNU/Linux 2.6 (newer, 3) Subject: Re: [PATCH] use UUID to map system devices to grub devices X-BeenThere: grub-devel@gnu.org X-Mailman-Version: 2.1.5 Precedence: list Reply-To: The development of GRUB 2 List-Id: The development of GRUB 2 List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 04 Aug 2009 21:20:11 -0000 On Fri, Jul 31, 2009 at 06:26:51PM +0200, Felix Zielcke wrote: > > If we'd do an arbitrary mapping then `grub-probe -t drive' would show > the wrong grub device. > But except from this I think that would be okay. We can never garantee that `grub-probe -t drive' will show the "right" drive, at least on i386-pc, because we don't know how is BIOS going to order them. Maybe Linux order depends on a race, and is different every time! This actually happens with some devices. So the best we can do is to avoid reliing on it entirely, by using UUIDs in the upper layer. We don't need to use UUIDs here, because they're already being used to find the right filesystem when we boot. -- Robert Millan The DRM opt-in fallacy: "Your data belongs to us. We will decide when (and how) you may access your data; but nobody's threatening your freedom: we still allow you to remove your data and not access it at all."