From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753410AbYAMRTj (ORCPT ); Sun, 13 Jan 2008 12:19:39 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1752867AbYAMRT3 (ORCPT ); Sun, 13 Jan 2008 12:19:29 -0500 Received: from gprs189-60.eurotel.cz ([160.218.189.60]:2668 "EHLO spitz.ucw.cz" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1752394AbYAMRT2 (ORCPT ); Sun, 13 Jan 2008 12:19:28 -0500 Date: Sun, 13 Jan 2008 17:19:16 +0000 From: Pavel Machek To: Theodore Tso , Al Boldi , Valerie Henson , Rik van Riel , linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org Subject: Re: [RFD] Incremental fsck Message-ID: <20080113171916.GB4132@ucw.cz> References: <200801090022.55589.a1426z@gawab.com> <200801090740.12989.a1426z@gawab.com> <70b6f0bf0801082345vf57951ey642e35c3d6e5194f@mail.gmail.com> <200801091452.14890.a1426z@gawab.com> <20080112145140.GB6751@mit.edu> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20080112145140.GB6751@mit.edu> User-Agent: Mutt/1.5.9i Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Sat 2008-01-12 09:51:40, Theodore Tso wrote: > On Wed, Jan 09, 2008 at 02:52:14PM +0300, Al Boldi wrote: > > > > Ok, but let's look at this a bit more opportunistic / optimistic. > > > > Even after a black-out shutdown, the corruption is pretty minimal, using > > ext3fs at least. > > > > After a unclean shutdown, assuming you have decent hardware that > doesn't lie about when blocks hit iron oxide, you shouldn't have any > corruption at all. If you have crappy hardware, then all bets are off.... What hardware is crappy here. Lets say... internal hdd in thinkpad x60? What are ext3 expectations of disk (is there doc somewhere)? For example... if disk does not lie, but powerfail during write damages the sector -- is ext3 still going to work properly? If disk does not lie, but powerfail during write may cause random numbers to be returned on read -- can fsck handle that? What abou disk that kills 5 sectors around sector being written during powerfail; can ext3 survive that? Pavel -- (english) http://www.livejournal.com/~pavelmachek (cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html