From: Valerie Aurora Subject: Re: ll_ver_fs data verification failure - 96TB fs Date: Thu, 6 Aug 2009 16:36:26 -0400 Message-ID: <20090806203626.GF1800@shell> References: <28623.1249307676@gamaville.dokosmarshall.org> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Cc: linux-ext4@vger.kernel.org To: Nick Dokos Return-path: Received: from mx1.redhat.com ([66.187.233.31]:58716 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753465AbZHFUg0 (ORCPT ); Thu, 6 Aug 2009 16:36:26 -0400 Content-Disposition: inline In-Reply-To: <28623.1249307676@gamaville.dokosmarshall.org> Sender: linux-ext4-owner@vger.kernel.org List-ID: On Mon, Aug 03, 2009 at 09:54:36AM -0400, Nick Dokos wrote: > Just a heads-up for now. I ran ll_ver_fs on a 96TB fs - the write phase > finished without problems, but the read phase encountered a problem: > > ... > read File name: /mnt/dir00373/file026 > > liverfs: verify /mnt/dir00373/file026 failed offset/timestamp/inode 3244298240/1248819541/1096796: found 3243249664/1248819541/1096796 instead > > liverfs: Data verification failed > 770.45user 218639.65system 67:38:18elapsed 90%CPU (0avgtext+0avgdata 0maxresident)k > 100357573552inputs+195522668184outputs (1major+414minor)pagefaults 0swaps > make: *** [llver] Error 2 > > > The offset difference is exactly 1M, and it occurs about 3GB into the file. Just a note, this is an off-by-one rather than a bit flip: obase=2 3244298240 11000001011000000001000000000000 3243249664 11000001010100000001000000000000 -VAL