Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1758227AbXFUUJd (ORCPT ); Thu, 21 Jun 2007 16:09:33 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1755140AbXFUUJY (ORCPT ); Thu, 21 Jun 2007 16:09:24 -0400 Received: from 41-052.adsl.zetnet.co.uk ([194.247.41.52]:38007 "EHLO mail.esperi.org.uk" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753138AbXFUUJX (ORCPT ); Thu, 21 Jun 2007 16:09:23 -0400 To: Neil Brown Cc: David Chinner , Avi Kivity , david@lang.hm, linux-kernel@vger.kernel.org, linux-raid@vger.kernel.org Subject: Re: limits on raid References: <18034.479.256870.600360@notabene.brown> <18034.3676.477575.490448@notabene.brown> <467273AB.9010202@argo.co.il> <18035.3009.568832.785308@notabene.brown> <20070618045759.GD85884050@sgi.com> <18041.59628.370832.633244@notabene.brown> From: Nix Emacs: more than just a Lisp interpreter, a text editor as well! Date: Thu, 21 Jun 2007 21:08:54 +0100 In-Reply-To: <18041.59628.370832.633244@notabene.brown> (Neil Brown's message of "21 Jun 2007 03:57:09 +0100") Message-ID: <87d4zp1355.fsf@hades.wkstn.nix> User-Agent: Gnus/5.1007 (Gnus v5.10.7) XEmacs/21.5-b27 (linux) MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii X-DCC-CTc-dcc2-Metrics: hades 1031; Body=6 Fuz1=6 Fuz2=6 Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 994 Lines: 22 On 21 Jun 2007, Neil Brown stated: > I have that - apparently naive - idea that drives use strong checksum, > and will never return bad data, only good data or an error. If this > isn't right, then it would really help to understand what the cause of > other failures are before working out how to handle them.... Look at the section `Disks and errors' in Val Henson's excellent report on last year's filesystems workshop: . Most of the error modes given there lead to valid checksums and wrong data... (while you're there, read the first part too :) ) -- `... in the sense that dragons logically follow evolution so they would be able to wield metal.' --- Kenneth Eng's colourless green ideas sleep furiously - 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/