From: Andreas Dilger Subject: Re: fsck.ext4: Group descriptors look bad... trying backup blocks... Date: Mon, 20 Apr 2009 12:28:00 -0600 Message-ID: <20090420182800.GC3209@webber.adilger.int> References: <49E8B5AD.6030907@redhat.com> <20090420113534.GR19186@mit.edu> <20090420124810.GT19186@mit.edu> <49EC8B97.6010308@redhat.com> <49EC9A11.1080105@redhat.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7BIT Cc: Eric Sandeen , Theodore Tso , linux-ext4@vger.kernel.org To: Jeremy Sanders Return-path: Received: from sca-es-mail-2.Sun.COM ([192.18.43.133]:37293 "EHLO sca-es-mail-2.sun.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751744AbZDTS2U (ORCPT ); Mon, 20 Apr 2009 14:28:20 -0400 Received: from fe-sfbay-09.sun.com ([192.18.43.129]) by sca-es-mail-2.sun.com (8.13.7+Sun/8.12.9) with ESMTP id n3KISFTI009297 for ; Mon, 20 Apr 2009 11:28:15 -0700 (PDT) Content-disposition: inline Received: from conversion-daemon.fe-sfbay-09.sun.com by fe-sfbay-09.sun.com (Sun Java(tm) System Messaging Server 7.0-5.01 64bit (built Feb 19 2009)) id <0KIE00800WD7YJ00@fe-sfbay-09.sun.com> for linux-ext4@vger.kernel.org; Mon, 20 Apr 2009 11:28:15 -0700 (PDT) In-reply-to: Sender: linux-ext4-owner@vger.kernel.org List-ID: On Apr 20, 2009 16:53 +0100, Jeremy Sanders wrote: > On Mon, 20 Apr 2009, Eric Sandeen wrote: >> Eric Sandeen wrote: >>> Theodore Tso wrote: >>>> On Mon, Apr 20, 2009 at 12:43:37PM +0100, Jeremy Sanders wrote: >>>>> It takes a day or two to do the sync. I've only done it twice (one with >>>>> the old kernel, once with the new fedora testing kernel) and it happened >>>>> both times. I'm afraid the statistics are rather low number here. >>>>> >>>>> I did a different faster test (just copying my home directory lots of >>>>> times), but I wasn't able to get it to fail. That test didn't use much >>>>> disk space, however. Maybe it's worth just dd'ing a few TB of data onto >>>>> the device and seeing whether that fails. >>>>> >>>>> I didn't reboot this time - I did last time. I just unmounted the file >>>>> system and fsckd it. The filesystem is 8.2TB and the data is around >>>>> 2.5TB. >>> >>> I think trying a filesystem with just under 8T would be a useful test too. >> >> One other question - do you make use of xattrs on this filesystem? > > No. If you use anything like SELinux or ACLs you would also (indirectly) be using xattrs. Cheers, Andreas -- Andreas Dilger Sr. Staff Engineer, Lustre Group Sun Microsystems of Canada, Inc.