From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mailman by lists.gnu.org with archive (Exim 4.43) id 1PkJ43-0003qS-3f for mharc-grub-devel@gnu.org; Tue, 01 Feb 2011 11:26:47 -0500 Received: from [140.186.70.92] (port=58940 helo=eggs.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1PkJ40-0003pe-Aj for grub-devel@gnu.org; Tue, 01 Feb 2011 11:26:45 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1PkJ3z-0000M0-5A for grub-devel@gnu.org; Tue, 01 Feb 2011 11:26:44 -0500 Received: from caffeine.csclub.uwaterloo.ca ([129.97.134.17]:40954) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1PkJ3z-0000Lv-2c for grub-devel@gnu.org; Tue, 01 Feb 2011 11:26:43 -0500 Received: by caffeine.csclub.uwaterloo.ca (Postfix, from userid 20367) id 414C1137A9; Tue, 1 Feb 2011 11:26:42 -0500 (EST) Date: Tue, 1 Feb 2011 11:26:42 -0500 To: Phillip Susi Message-ID: <20110201162642.GU343@caffeine.csclub.uwaterloo.ca> References: <4CF81A16.2010606@cfl.rr.com> <20101203123615.6edce071@notabene.brown> <4CF860EB.7010005@cfl.rr.com> <20101209094354.4c6aaa93@notabene.brown> <4D01328D.9050503@cfl.rr.com> <4D46E6D7.2000205@cfl.rr.com> <20110131170349.GR343@caffeine.csclub.uwaterloo.ca> <4D470BCF.20508@cfl.rr.com> <20110131221252.GT343@caffeine.csclub.uwaterloo.ca> <4D47627A.1080509@cfl.rr.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <4D47627A.1080509@cfl.rr.com> User-Agent: Mutt/1.5.18 (2008-05-17) From: lsorense@csclub.uwaterloo.ca (Lennart Sorensen) X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.6 (newer, 3) X-Received-From: 129.97.134.17 Cc: Neil Brown , The development of GNU GRUB , John Sheu , linux-raid@vger.kernel.org, Lennart Sorensen Subject: Re: Software RAID and Fakeraid X-BeenThere: grub-devel@gnu.org X-Mailman-Version: 2.1.5 Precedence: list Reply-To: The development of GNU GRUB List-Id: The development of GNU GRUB List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 01 Feb 2011 16:26:45 -0000 On Mon, Jan 31, 2011 at 08:31:38PM -0500, Phillip Susi wrote: > What do you mean help? If the raid stores the raid info at the end, then the data starts at sector 0. So no space for a bootloader at all. > It is left empty afaik, which is the whole point of shifting it over to 4kb. Certainly makes sense. Now is 4K enough for a boot loader? Not sure. > Obviously doing nothing is the simplest thing one can do. Instead I > would like to do something and end up with a better, more functional > system. Hence my suggestion on WHAT to do and the existence of this > entire thread. I personally consider soft raid on raw devices so convluted that I have never done it. I would rather have something I know works with my bootloader and other tools, than gain that extra 1MB (at most) that not having partitions gives. Also given many PCs won't boot from a drive without a partition table, it isn't even an option then. Really I think it comes down to only being able to handle the case where there is a 4K gap, if you can fit grub in there in a format that a system would be able to boot reading just sector 0 of the device. The raid info at the start and raid info at the end both prevent you from having any boot code in sector 0 so can't be supported at all. -- Len Sorensen