Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755322AbYCMNoa (ORCPT ); Thu, 13 Mar 2008 09:44:30 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1752216AbYCMNoW (ORCPT ); Thu, 13 Mar 2008 09:44:22 -0400 Received: from zux006-051-205.adsl.green.ch ([81.6.51.205]:20935 "EHLO the-village.bc.nu" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1751952AbYCMNoW (ORCPT ); Thu, 13 Mar 2008 09:44:22 -0400 Date: Thu, 13 Mar 2008 13:22:11 +0000 From: Alan Cox To: Daniel Phillips Cc: David Newall , linux-kernel@vger.kernel.org Subject: Re: [ANNOUNCE] Ramback: faster than a speeding bullet Message-ID: <20080313132211.6af855b3@the-village.bc.nu> In-Reply-To: <200803122314.18244.phillips@phunq.net> References: <200803092346.17556.phillips@phunq.net> <200803121029.54108.phillips@phunq.net> <47D8BE08.6040800@davidnewall.com> <200803122314.18244.phillips@phunq.net> X-Mailer: Claws Mail 3.2.0 (GTK+ 2.12.5; i386-redhat-linux-gnu) Organization: Red Hat UK Cyf., Amberley Place, 107-111 Peascod Street, Windsor, Berkshire, SL4 1TE, Y Deyrnas Gyfunol. Cofrestrwyd yng Nghymru a Lloegr o'r rhif cofrestru 3798903 Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1184 Lines: 29 On Wed, 12 Mar 2008 22:14:16 -0800 Daniel Phillips wrote: > On Wednesday 12 March 2008 22:39, David Newall wrote: > > Daniel Phillips wrote: > > > Particularly about Ext2/Ext3, which does recover well from random damage. > > > My experience. > > > > By "recover well", you must mean "loses massive swabs of data, leaving > > the system unbootable and with enormous numbers of user files missing." > > My experience. > > > > Expecting fsck to cover for missed writes is stupid. > > Whatever it can get off the disk it gets. It does a good job. If you > don't think so, then don't tell me, tell Ted. He knows. Ext3 cannot recover well from massive loss of intermediate writes. It isn't a normal failure mode and there isn't sufficient fs metadata robustness for this. A log structured backing store would deal with that but all you apparently want to do is scream FUD at anyone who doesn't agree with you. Alan -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/