From mboxrd@z Thu Jan 1 00:00:00 1970 From: John Robinson Subject: Re: Raid 5 to 6 is it do-able/safe? Date: Tue, 29 Dec 2009 13:31:47 +0000 Message-ID: <4B3A04C3.5070804@anonymous.org.uk> References: <305721.15040.qm@web51302.mail.re2.yahoo.com> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: Sender: linux-raid-owner@vger.kernel.org To: Mikael Abrahamsson Cc: Jon@eHardcastle.com, linux-raid@vger.kernel.org List-Id: linux-raid.ids On 29/12/2009 12:08, Mikael Abrahamsson wrote: > On Tue, 29 Dec 2009, Jon Hardcastle wrote: > >> I run gentoo with kernel 2.6.22-gentoo-r8 >> >> to convert my 6 drive +1 spare raid 5 to a 7 drive raid 6? > > No, you need at least kernel 2.6.32 to migrate from raid5 to raid6. But if you don't want to run 2.6.32 permanently/on your live system, iirc you can just run it to do the migration, and once the migration and reshape have completed, you can go back to your production kernel. Having said that, 2.6.22's a bit old and I don't see it listed on Gentoo's package web site, so you might think of updating to something more recent anyway. Cheers, John.