From mboxrd@z Thu Jan 1 00:00:00 1970 From: Neil Brown Subject: Re: RAID6 mdadm --grow bug? Date: Thu, 13 Sep 2007 19:49:47 +0200 Message-ID: <18153.30779.865508.713927@notabene.brown> References: <42161BFD-EAE6-4485-8DE6-05D0EBE51A06@fusion.gat.com> <18153.5726.377390.171544@notabene.brown> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: message from David Miller on Thursday September 13 Sender: linux-raid-owner@vger.kernel.org To: David Miller Cc: linux-raid@vger.kernel.org List-Id: linux-raid.ids On Thursday September 13, millerdc@fusion.gat.com wrote: > Neil, > > On RHEL5 the kernel is 2.6.18-8.1.8. On Ubuntu 7.04 the kernel is > 2.6.20-16. Someone on the Arstechnica forums wrote they see the same > thing in Debian etch running kernel 2.6.18. Below is a messages log > from the RHEL5 system. I have only included the section for creating > the RAID6, adding a spare and trying to grow it. There is a one line > error when I do the "mdadm --grow" command. It is "md: couldn't > update array info. -22." reshaping raid6 arrays was not supported until 2.6.21. So you'll need a newer kernel. NeilBrown