From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756552AbZHZAQz (ORCPT ); Tue, 25 Aug 2009 20:16:55 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1756524AbZHZAQy (ORCPT ); Tue, 25 Aug 2009 20:16:54 -0400 Received: from atrey.karlin.mff.cuni.cz ([195.113.26.193]:36574 "EHLO atrey.karlin.mff.cuni.cz" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756481AbZHZAQx (ORCPT ); Tue, 25 Aug 2009 20:16:53 -0400 Date: Wed, 26 Aug 2009 02:16:46 +0200 From: Pavel Machek To: Ric Wheeler Cc: Theodore Tso , Florian Weimer , Goswin von Brederlow , Rob Landley , kernel list , Andrew Morton , mtk.manpages@gmail.com, rdunlap@xenotime.net, linux-doc@vger.kernel.org, linux-ext4@vger.kernel.org, corbet@lwn.net Subject: Re: [patch] ext2/3: document conditions when reliable operation is possible Message-ID: <20090826001645.GN4300@elf.ucw.cz> References: <20090825094244.GC15563@elf.ucw.cz> <4A93E908.6050908@redhat.com> <20090825211515.GA3688@elf.ucw.cz> <4A9468E8.607@redhat.com> <20090825225114.GE4300@elf.ucw.cz> <4A946DD1.8090906@redhat.com> <20090825232601.GF4300@elf.ucw.cz> <4A947682.2010204@redhat.com> <20090825235359.GJ4300@elf.ucw.cz> <4A947DA9.2080906@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <4A947DA9.2080906@redhat.com> X-Warning: Reading this can be dangerous to your mental health. User-Agent: Mutt/1.5.18 (2008-05-17) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tue 2009-08-25 20:11:21, Ric Wheeler wrote: > On 08/25/2009 07:53 PM, Pavel Machek wrote: >>> Why don't you hold all of your most precious data on that single S-ATA >>> drive for five year on one box and put a second copy on a small RAID5 >>> with ext3 for the same period? >>> >>> Repeat experiment until you get up to something like google scale or the >>> other papers on failures in national labs in the US and then we can have >>> an informed discussion. >> >> I'm not interested in discussing statistics with you. I'd rather discuss >> fsync() and storage design issues. >> >> ext3 is designed to work on single SATA disks, and it is not designed >> to work on flash cards/degraded MD RAID5s, as Ted acknowledged. > > You are simply incorrect, Ted did not say that ext3 does not work > with MD raid5. http://lkml.org/lkml/2009/8/25/312 Pavel -- (english) http://www.livejournal.com/~pavelmachek (cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html