From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from list by lists.gnu.org with archive (Exim 4.71) id 1U3raT-0004SO-Nj for mharc-grub-devel@gnu.org; Fri, 08 Feb 2013 12:18:09 -0500 Received: from eggs.gnu.org ([208.118.235.92]:50976) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1U3raL-0004OT-Rr for grub-devel@gnu.org; Fri, 08 Feb 2013 12:18:08 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1U3raI-0007m9-UJ for grub-devel@gnu.org; Fri, 08 Feb 2013 12:18:01 -0500 Received: from dgate20.ts.fujitsu.com ([80.70.172.51]:33416) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1U3raI-0007m4-JP for grub-devel@gnu.org; Fri, 08 Feb 2013 12:17:58 -0500 DomainKey-Signature: s=s1536a; d=ts.fujitsu.com; c=nofws; q=dns; h=X-SBRSScore:X-IronPort-AV:Received:X-IronPort-AV: Received:Message-ID:Date:From:Organization:User-Agent: MIME-Version:To:Subject:References:In-Reply-To: X-Enigmail-Version:Content-Type:Content-Transfer-Encoding; b=ZEBfD08nsHDJIghbPIBoptzc0XnNCOmUEjYVtx31/IvlwcWGqN842bDo zso1nzHwuzmebFxhHQv5AfS00PW2GewtXNTg2CtACmrEAU2j5Xt64RGA4 OZx5ufcQfj8BPVTlIW90XGwb2GO7q/Mp8qe8F6b1X0fEtWgrroFLYUl6A 8tVAZLcs0nvjOwYs5QYAk+jtIRbtMUDYkgNSN1QABD2Ed7zQ+lELClXT1 FwysjERrzygeN+3Drre6hWPJnc5bA; DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=ts.fujitsu.com; i=@ts.fujitsu.com; q=dns/txt; s=s1536b; t=1360343879; x=1391879879; h=message-id:date:from:mime-version:to:subject:references: in-reply-to:content-transfer-encoding; bh=qerVhePXtXxQuBsnvgN0kjBHbddfjJl3WZVT0gzePfE=; b=uuGDbUOBZFcGckIVCVHIXMR67Is9ER3rXdrVdmbga8mes2u1zjhQJ18L uk8PqSRoVN+ez7V44B4+YNoaLq9eC78N8Qog378+X+iUDzZqlR1qC+BaW mnS8C/VxzCZN5AsZwELAIXxhU7Hwk4MRuSQONk5p5Z68clVQVxL4HTssb Wq94GJNRa/g/dyGu9OXCASKmNB+RCdxPrZsqILKDjH/9KVnelg2qhyGuT ca/VLWbuPt+1nA0fY6C2SYv8iPiCn; X-SBRSScore: None X-IronPort-AV: E=Sophos;i="4.84,630,1355094000"; d="scan'208";a="115542652" Received: from unknown (HELO abgdgate60u.abg.fsc.net) ([172.25.138.90]) by dgate20u.abg.fsc.net with ESMTP; 08 Feb 2013 18:17:57 +0100 X-IronPort-AV: E=Sophos;i="4.84,630,1355094000"; d="scan'208";a="5372218" Received: from unknown (HELO cooper.psw.pdbps.fsc.net) ([172.25.253.64]) by abgdgate60u.abg.fsc.net with ESMTP; 08 Feb 2013 18:17:57 +0100 Message-ID: <51153345.2020509@ts.fujitsu.com> Date: Fri, 08 Feb 2013 18:17:57 +0100 From: Martin Wilck Organization: Fujitsu Technology Solutions User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:17.0) Gecko/20130110 Thunderbird/17.0.2 MIME-Version: 1.0 To: The development of GNU GRUB Subject: Re: GRUB and the risk of block list corruption in extX References: <51138645.4050405@ts.fujitsu.com> In-Reply-To: X-Enigmail-Version: 1.5.0 Content-Type: text/plain; charset=ISO-8859-15 Content-Transfer-Encoding: 7bit X-detected-operating-system: by eggs.gnu.org: Genre and OS details not recognized. X-Received-From: 80.70.172.51 X-BeenThere: grub-devel@gnu.org X-Mailman-Version: 2.1.14 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: Fri, 08 Feb 2013 17:18:08 -0000 > This is not a complete answer but one of my problems is that such > requests don't even suply any kind of reason to go into such installs. > We nerd to consider usecases before even considering using an approach > which is known for some pretty serious problems. Will answer in more > details later. In my case, the reason is a multiboot setup based on chainloading the indiviual installed OS's bootloaders from a central, primary bootloader. This is easily accomplished by installing the individual OS's bootloaders in their respective "/" or "/boot" partitions. Linux distributions have encouraged this kind of setup over several years - "install boot loader in first sector of root/boot partition" used to be a prominent option somewhere in the installation process (these distributions were usually GRUB 0.9x based - GRUB 0.9x developers didn't seem to have a big issue with stage1_5 being loaded via block lists). Recent GRUB2-based distributions like Fedora have removed this option, and some users are dissatisfied with that. I would like to understand what the actual risk is. So I'd appreciate examples for the "pretty serious problems" you mention. Regards Martin -- Dr. Martin Wilck PRIMERGY System Software Engineer x86 Server Engineering FUJITSU Fujitsu Technology Solutions GmbH Heinz-Nixdorf-Ring 1 33106 Paderborn, Germany Phone: ++49 5251 525 2796 Fax: ++49 5251 525 2820 Email: martin.wilck@ts.fujitsu.com Internet: http://ts.fujitsu.com Company Details: http://ts.fujitsu.com/imprint