From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752034AbZH2KUs (ORCPT ); Sat, 29 Aug 2009 06:20:48 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751462AbZH2KUr (ORCPT ); Sat, 29 Aug 2009 06:20:47 -0400 Received: from atrey.karlin.mff.cuni.cz ([195.113.26.193]:53614 "EHLO atrey.karlin.mff.cuni.cz" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751314AbZH2KUq (ORCPT ); Sat, 29 Aug 2009 06:20:46 -0400 Date: Sat, 29 Aug 2009 11:39:47 +0200 From: Pavel Machek To: Rik van Riel Cc: Ric Wheeler , david@lang.hm, 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] document flash/RAID dangers Message-ID: <20090829093947.GE1634@ucw.cz> References: <20090825224004.GD4300@elf.ucw.cz> <20090825233701.GH4300@elf.ucw.cz> <4A947839.4010601@redhat.com> <20090826000657.GK4300@elf.ucw.cz> <4A947E05.8070406@redhat.com> <20090826002045.GO4300@elf.ucw.cz> <4A94B8FE.8050307@redhat.com> <20090826112219.GE26595@elf.ucw.cz> <4A954A98.5070808@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <4A954A98.5070808@redhat.com> 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 Wed 2009-08-26 10:45:44, Rik van Riel wrote: > Pavel Machek wrote: > >> Sledgehammer is hardware problem, and I'm demonstrating >> software/documentation problem we have here. > > So your argument is that a sledgehammer is a hardware > problem, while a broken hard disk and a power failure > are software/documentation issues? > > I'd argue that the broken hard disk and power failure > are hardware issues, too. Noone told me that degraded md raid5 is dangerous. Thats documentation issue #1. Maybe I just pulled the disk for fun. ext3 docs told me that journal protects me against fs corruption during power fails. It does not in this particular case. Seems like docs issue #2. Maybe I just hit the reset button because it was there. Randomly hitting power button may be stupid, but should not result in filesystem corruption on reasonably working filesystem/storage stack. Pavel -- (english) http://www.livejournal.com/~pavelmachek (cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html