From: Valerie Clement Subject: Re: 64 bit support for ext4 problem Date: Tue, 31 Jul 2007 11:39:09 +0200 Message-ID: <46AF033D.6020909@bull.net> References: <46AEE61B.5000207@fmi.uni-sofia.bg> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: QUOTED-PRINTABLE Cc: linux-ext4@vger.kernel.org To: anton.andreev@fmi.uni-sofia.bg Return-path: Received: from ecfrec.frec.bull.fr ([129.183.4.8]:33903 "EHLO ecfrec.frec.bull.fr" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752717AbXGaJi2 (ORCPT ); Tue, 31 Jul 2007 05:38:28 -0400 In-Reply-To: <46AEE61B.5000207@fmi.uni-sofia.bg> Sender: linux-ext4-owner@vger.kernel.org List-Id: linux-ext4.vger.kernel.org Anton Andreev wrote: > Hi, >=20 > I want to try my ext4 to be 64 bit. >=20 > I could not patch e2fsprogs-1.39=20 > =20 > with=20 > http://www.bullopensource.org/ext4/patches/ext4-e2fsprogs-1.39.patch.= tar=20 > . I would appreciate if someone tell me exactly how to do that. >=20 > Does the newest version of e2fsprogs=20 > =20 > supports the features in the patch? Hi Anton, you need to patch the e2fsprogs only if you want to create an ext4=20 filesystem larger than 16 TB with 4KB block size. If it is your case, I could send you a more recent version of patches. Let me know. Ext4 supports 48-bit physical block numbers, not yet 64-bit physical=20 block numbers; this is due to the use of extents mapping. If you want to use the extent format (mount -t ext4dev -o extents), I=20 think you should use the latest version of e2fsprogs available here: http://prdownloads.sourceforge.net/e2fsprogs/e2fsprogs-1.40.2.tar.gz ftp://ftp.kernel.org/pub/linux/kernel/people/tytso/e2fsprogs/e2fsprogs-= 1.40.2.tar.gz This version should integrate the extents capability. Remember that if you use extents, your filesystem will no longer be=20 mountable by ext3. Regards, Val=E9rie