From: Eric Sandeen Subject: Re: [PATCH] libext2fs: use ext2fs_blocks_count() in ext2fs_open2() Date: Wed, 02 Sep 2009 21:41:14 -0500 Message-ID: <4A9F2CCA.8000307@redhat.com> References: <20090902055953.GF4197@webber.adilger.int> <150c16850909012305y2481c54fra671b123780caa80@mail.gmail.com> <4A9EA09E.10509@redhat.com> <13135.1251925342@alphaville.usa.hp.com> <150c16850909021428v5e001691r8a5e28b5c1be9326@mail.gmail.com> <13808.1251927450@alphaville.usa.hp.com> <4A9EE6FF.4000901@redhat.com> <150c16850909021445se2ebc6ahc896dc6c5aa56f8b@mail.gmail.com> <4A9EF2AB.3090602@redhat.com> <20090902225531.GD4197@webber.adilger.int> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Cc: Justin Maggard , nicholas.dokos@hp.com, ext4 development , Theodore Ts'o To: Andreas Dilger Return-path: Received: from sandeen.net ([209.173.210.139]:12357 "EHLO mail.sandeen.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753963AbZICClM (ORCPT ); Wed, 2 Sep 2009 22:41:12 -0400 In-Reply-To: <20090902225531.GD4197@webber.adilger.int> Sender: linux-ext4-owner@vger.kernel.org List-ID: Andreas Dilger wrote: > On Sep 02, 2009 17:33 -0500, Eric Sandeen wrote: >> Justin Maggard wrote: >>> On Wed, Sep 2, 2009 at 2:43 PM, Eric Sandeen wrote: >>>> You guys are still getting bad checksums? >>> Yeah, I am. >> Oh, sorry, all the other bugs gave me a head-fake, and I forgot the >> original problem of -fsck- corrupting the checksums. :) I had a simple >> mkdir giving me the corruptions. Ok, on to that. > > I found the source of the checksum error last night - the reserved bytes > in the 64-bit group descriptor are not zero after the e2fsck is run. > It should be pretty easy to run e2fsck under gdb and put a hardware watch > on those bytes to see who twiddles them. Thanks, I saw that email a bit late today, will take a look. -Eric > Cheers, Andreas > -- > Andreas Dilger > Sr. Staff Engineer, Lustre Group > Sun Microsystems of Canada, Inc.