From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755047AbZHYOHA (ORCPT ); Tue, 25 Aug 2009 10:07:00 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1755023AbZHYOG7 (ORCPT ); Tue, 25 Aug 2009 10:06:59 -0400 Received: from bee.hiwaay.net ([216.180.54.11]:65437 "EHLO bee.hiwaay.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754997AbZHYOG7 (ORCPT ); Tue, 25 Aug 2009 10:06:59 -0400 X-Greylist: delayed 599 seconds by postgrey-1.27 at vger.kernel.org; Tue, 25 Aug 2009 10:06:59 EDT Date: Tue, 25 Aug 2009 08:57:00 -0500 From: Chris Adams To: linux-kernel@vger.kernel.org Subject: Re: [patch] ext2/3: document conditions when reliable operation is possible Message-ID: <20090825135700.GA1552296@hiwaay.net> References: Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20090824223915.GI17684@mit.edu> User-Agent: Mutt/1.4i Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Once upon a time, Theodore Tso said: >I'll note, BTW, that AIX uses a journal to protect against these sorts >of problems with software raid; this also means that with AIX, you >also don't have to rebuild a RAID 1 device after an unclean shutdown, >like you have do with Linux MD. This was on the EVMS's team >development list to implement for Linux, but it got canned after LVM >won out, lo those many years ago. See mdadm(8) and look for "--bitmap". It has a few issues (can't reshape an array with a bitmap for example; you have to remove the bitmap, reshape, and re-add the bitmap), but it is available. -- Chris Adams Systems and Network Administrator - HiWAAY Internet Services I don't speak for anybody but myself - that's enough trouble.