From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mailman by lists.gnu.org with archive (Exim 4.43) id 1OEp2v-0004IH-Ng for mharc-grub-devel@gnu.org; Wed, 19 May 2010 15:35:13 -0400 Received: from [140.186.70.92] (port=56829 helo=eggs.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1OEp2s-0004Fo-Le for grub-devel@gnu.org; Wed, 19 May 2010 15:35:11 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.69) (envelope-from ) id 1OEp2r-00038y-42 for grub-devel@gnu.org; Wed, 19 May 2010 15:35:10 -0400 Received: from mail.gmx.net ([213.165.64.20]:48595) by eggs.gnu.org with smtp (Exim 4.69) (envelope-from ) id 1OEp2p-00038e-FI for grub-devel@gnu.org; Wed, 19 May 2010 15:35:09 -0400 Received: (qmail invoked by alias); 19 May 2010 19:35:04 -0000 Received: from 165.126.46.212.adsl.ncore.de (HELO 192.168.2.69) [212.46.126.165] by mail.gmx.net (mp016) with SMTP; 19 May 2010 21:35:04 +0200 X-Authenticated: #2145628 X-Provags-ID: V01U2FsdGVkX1+TJ08CZ/KTs4IBix4EBmfAa3OP/Gj1jpjLmJtlXo lz+OnBNOErH5YG Date: Wed, 19 May 2010 21:34:28 +0200 From: "Thomas Schmitt" To: grub-devel@gnu.org References: <4BF43084.9060702@isaac.cedarswampstudios.org> In-Reply-To: <4BF43084.9060702@isaac.cedarswampstudios.org> Message-Id: <106227877626403@192.168.2.69> X-Y-GMX-Trusted: 0 X-detected-operating-system: by eggs.gnu.org: Genre and OS details not recognized. Subject: Re: Migrations to xorriso 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: Wed, 19 May 2010 19:35:12 -0000 Hi, Isaac Dupree wrote: > What size range are the whole images? The minimum output of grub-mkrescue 1.98 with xorriso is 1544192 bytes. grub-mkisofs: 1550336 genisoimage: 1859584 (-307200 with -no-pad) One may add lots of other files, of course. > Also I guess no one compresses whole ISOs It makes few sense to compress the ISO as a whole. But one could compress some files in it. One could implement a reader for H. Peter Anvin's zisofs format in GRUB's ISO 9660 reader - if not present already. zisofs is a transparent content compression of single files. A reader is implemented in the Linux kernel. See macro CONFIG_ZISOFS in fs/isofs/*.[ch]. An authorised description is given in doc/zisofs_format.txt of xorriso resp. in http://bazaar.launchpad.net/~libburnia-team/libisofs/scdbackup/annotate/head:/doc/zisofs_format.txt The ISO 9660 directory tree stays uncompressed. Compressed and uncompressed files can be mixed. xorriso can produce zisofs compressed data files on the fly (needs zlib). A grub-mkrescue 1.98 image with all files compressed has 884736 bytes. But one would have to leave those files uncompressed which are needed for reading ISO 9660 and zisofs compression. Have a nice day :) Thomas