From mboxrd@z Thu Jan 1 00:00:00 1970 From: Gilad Arnold Subject: Re: migrating from RAID5 to RAID10 Date: Thu, 17 Jun 2010 21:01:08 -0700 Message-ID: <20100618040107.GA13272@scorpio.mgarnold.homelinux.org> References: <20100609151132.GA10082@libra.CS.Berkeley.EDU> <20100611005231.401529c0@natsu> <20100610195851.GA8408@libra.CS.Berkeley.EDU> <4C18F39E.8010600@tmr.com> <20100617072631.09641f48@notabene.brown> <20100617174445.GB8450@libra.CS.Berkeley.EDU> <20100617224657.GD8450@libra.CS.Berkeley.EDU> <20100618123910.711b527b@notabene.brown> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Return-path: Content-Disposition: inline In-Reply-To: <20100618123910.711b527b@notabene.brown> Sender: linux-raid-owner@vger.kernel.org To: Neil Brown Cc: Bill Davidsen , Roman Mamedov , linux-raid@vger.kernel.org List-Id: linux-raid.ids On Fri, Jun 18, 2010 at 12:39:10PM +1000, Neil Brown wrote: > > 1. Shutdown the RAID5. > > > > 2. Create a RAID10/f2 on top of one drive + missing, ignoring mdadm's > > warnings about an existing array. If I'm not terribly wrong, this > > will give me a degraded RAID10 that still has all my data in place. > > I cannot imagine why you would think that all your data would be in place. > I can assure that it would not. I was thinking it would be a similar case to the one mentioned here: http://scott.wallace.sh/2007/04/14/converting-raid1-to-raid5-with-no-data-loss/ Guess I was wrong. Thanks for the advice. Gilad