From mboxrd@z Thu Jan 1 00:00:00 1970 From: Neil Brown Subject: Re: RAID 6 grow problem Date: Sun, 3 Jun 2007 07:38:21 +1000 Message-ID: <18017.58189.826699.729848@notabene.brown> References: Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: message from Iain Rauch on Saturday June 2 Sender: linux-raid-owner@vger.kernel.org To: Iain Rauch Cc: Justin Piszcz , "linux-raid@vger.kernel.org" List-Id: linux-raid.ids On Saturday June 2, groups@email.iain.rauch.co.uk wrote: > > For the critical section part, it may be your syntax.. > > > > When I had the problem, Neil showed me the path! :) > I don't think it is incorrect, before I thought it was supposted to specify > an actual file so I 'touch'ed one and it says file exists. > > > For your issue, do you have raid5/6 GROW support enabled in the kernel? > > Also I grew mine I never used the --backup-file option. > I don't know, how would I find this out? uname -r gives me 2.6.20-15-server. raid6 reshape wasn't added until 2.6.21. Before that only raid5 was supported. You also need to ensure that CONFIG_MD_RAID5_RESHAPE=y. NeilBrown