From: Jeremy Sanders Subject: Re: fsck.ext4: Group descriptors look bad... trying backup blocks... Date: Mon, 20 Apr 2009 13:54:46 +0100 (BST) Message-ID: References: <49E8B5AD.6030907@redhat.com> <20090420113534.GR19186@mit.edu> <20090420124810.GT19186@mit.edu> Mime-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII; format=flowed Cc: linux-ext4@vger.kernel.org To: Theodore Tso Return-path: Received: from ppsw-5.csi.cam.ac.uk ([131.111.8.135]:40358 "EHLO ppsw-5.csi.cam.ac.uk" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754899AbZDTMys (ORCPT ); Mon, 20 Apr 2009 08:54:48 -0400 In-Reply-To: <20090420124810.GT19186@mit.edu> Sender: linux-ext4-owner@vger.kernel.org List-ID: On Mon, 20 Apr 2009, Theodore Tso wrote: > That's that's useful data. I wish we could make it fail more quickly > on a smaller rsync, but the fact that you didn't need to reboot is > definitely useful information. > > And this is a fresh rsync so no files were being deleted, rsync should > have just been writing new files to .filename.XXXXX and then renaming > the filename to filename.XXXXX when it is done, right? That's what I'd guess. It was onto a clean filesystem, so there shouldn't be any deletions. > OK, let me think about this a little. I think we can create a patch > which checks for writes to the block group descriptors and dumps a > stack trace. That would allow us catch the failing code in question > in the act, and maybe figure out what is going on. Ok. Jeremy -- Jeremy Sanders http://www-xray.ast.cam.ac.uk/~jss/ X-Ray Group, Institute of Astronomy, University of Cambridge, UK. Public Key Server PGP Key ID: E1AAE053