From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932314AbWAQIRV (ORCPT ); Tue, 17 Jan 2006 03:17:21 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S932315AbWAQIRV (ORCPT ); Tue, 17 Jan 2006 03:17:21 -0500 Received: from hobbit.corpit.ru ([81.13.94.6]:25685 "EHLO hobbit.corpit.ru") by vger.kernel.org with ESMTP id S932312AbWAQIRU (ORCPT ); Tue, 17 Jan 2006 03:17:20 -0500 Message-ID: <43CCA80B.4020603@tls.msk.ru> Date: Tue, 17 Jan 2006 11:17:15 +0300 From: Michael Tokarev User-Agent: Debian Thunderbird 1.0.2 (X11/20051002) X-Accept-Language: en-us, en MIME-Version: 1.0 To: NeilBrown CC: linux-raid@vger.kernel.org, linux-kernel@vger.kernel.org, "Steinar H. Gunderson" Subject: Re: [PATCH 000 of 5] md: Introduction References: <20060117174531.27739.patches@notabene> In-Reply-To: <20060117174531.27739.patches@notabene> X-Enigmail-Version: 0.91.0.0 Content-Type: text/plain; charset=KOI8-R Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org NeilBrown wrote: > Greetings. > > In line with the principle of "release early", following are 5 patches > against md in 2.6.latest which implement reshaping of a raid5 array. > By this I mean adding 1 or more drives to the array and then re-laying > out all of the data. Neil, is this online resizing/reshaping really needed? I understand all those words means alot for marketing persons - zero downtime, online resizing etc, but it is much safer and easier to do that stuff 'offline', on an inactive array, like raidreconf does - safer, easier, faster, and one have more possibilities for more complex changes. It isn't like you want to add/remove drives to/from your arrays every day... Alot of good hw raid cards are unable to perform such reshaping too. /mjt