From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mailman by lists.gnu.org with archive (Exim 4.43) id 1KSpiJ-0005Ry-Us for mharc-grub-devel@gnu.org; Tue, 12 Aug 2008 04:58:48 -0400 Received: from mailman by lists.gnu.org with tmda-scanned (Exim 4.43) id 1KSpiH-0005PL-GP for grub-devel@gnu.org; Tue, 12 Aug 2008 04:58:45 -0400 Received: from exim by lists.gnu.org with spam-scanned (Exim 4.43) id 1KSpiG-0005Mm-BU for grub-devel@gnu.org; Tue, 12 Aug 2008 04:58:44 -0400 Received: from [199.232.76.173] (port=46846 helo=monty-python.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1KSpiG-0005MW-85 for grub-devel@gnu.org; Tue, 12 Aug 2008 04:58:44 -0400 Received: from aybabtu.com ([69.60.117.155]:40178) by monty-python.gnu.org with esmtps (TLS-1.0:RSA_AES_256_CBC_SHA1:32) (Exim 4.60) (envelope-from ) id 1KSpiG-0007eT-6h for grub-devel@gnu.org; Tue, 12 Aug 2008 04:58:44 -0400 Received: from [192.168.10.10] (helo=thorin) by aybabtu.com with esmtps (TLS-1.0:RSA_AES_256_CBC_SHA1:32) (Exim 4.69) (envelope-from ) id 1KSpaG-00013r-3E for grub-devel@gnu.org; Tue, 12 Aug 2008 10:50:29 +0200 Received: from rmh by thorin with local (Exim 4.63) (envelope-from ) id 1KSph5-0000AT-2x for grub-devel@gnu.org; Tue, 12 Aug 2008 10:57:31 +0200 Date: Tue, 12 Aug 2008 10:57:31 +0200 From: Robert Millan To: The development of GRUB 2 Message-ID: <20080812085731.GB381@thorin> References: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: 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/1.5.13 (2006-08-11) X-detected-kernel: by monty-python.gnu.org: Genre and OS details not recognized. Subject: Re: Idea: Use extended blocklist format to support installing to raid device. 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, 12 Aug 2008 08:58:46 -0000 On Tue, Aug 12, 2008 at 09:38:52AM +0800, Bean wrote: > Hi, > > Currently, the blocklist format can only support traditional disk. I'm > thinking about a new format that can be used in raid as well. > > The new format is like this: > > checksum_0 blocklist_0 checksum_1 blocklist_1 ... > > The checksum is the checksum of sectors in the blocklist that follows. > For example: > > c1 10+20,40+10 c2 10+50 > > This means 10-30,40-50 sectors from one disk, then 10-60 sectors from > another disk. The checksum is used to find the correct disk. > > For traditional disk, we can also use this format, for example: > > c1 10+20,40+10 > > This can support install to different disk than the one core.img is > in, as it will scan all disks for the correct checksum at runtime. IMHO, I think we should try to get rid of blocklists, or avoid reliing on them as much as possible. Specially now that we have a good compression ratio for msdos partmaps, and plenty of space on gpt ones. -- 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."