From mboxrd@z Thu Jan 1 00:00:00 1970 From: Phil Turmel Subject: Re: kernel refuses devices mdadm -E accepts Date: Tue, 20 Jan 2015 13:28:23 -0500 Message-ID: <54BE9E47.9030706@turmel.org> References: Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: Sender: linux-raid-owner@vger.kernel.org To: "Wesley W. Terpstra" , linux-raid@vger.kernel.org List-Id: linux-raid.ids Hi Wesley, On 01/19/2015 06:01 PM, Wesley W. Terpstra wrote: > I was in the middle of a reshape of this 4-disk raid5 when something > rebooted the computer. The system seems otherwise fine, and I suspect > someone in the house. > > What is the correct next step? Should I try --run ? I would obviously > prefer not to lose the data on this array. I expect that the reshape > was NOT complete, so just recreating the array will probably corrupt > its contents. > > Kernel version 3.17.8 and mdadm version 3.3.2. There have been many bug fixes to mdadm since that kernel was retired. You should temporarily boot a current liveCD (my favorite is systemrescuecd) and do "mdadm -Afv /dev/mdX /dev/sdX ..." Show us the output of that if it doesn't work (it should resume your reshape). When it is done reshaping/recovering, consider upgrading your kernel. > Thanks for any help. If I lose this array, I am going to face a lot of grief... I shouldn't have to say this, but RAID is for availability, not for data security. You still need a backup system for any important data. Phil