From mboxrd@z Thu Jan 1 00:00:00 1970 From: =?UTF-8?Q?Patrik_Dahlstr=c3=b6m?= Subject: Re: Recover array after I panicked Date: Sat, 29 Apr 2017 00:46:15 +0200 Message-ID: <4c5d312b-fba6-da20-e08f-ed1a4ba5c313@powerlamerz.org> References: <20170424123706.GA6798@metamorpher.de> <20170424133946.GA7057@metamorpher.de> <727eeaf5-b856-305d-99b6-e42f3383b699@powerlamerz.org> <20170425001614.GA3936@metamorpher.de> <20170425090122.GA4488@metamorpher.de> <20170425110807.GA5159@metamorpher.de> <5c3f7876-1b25-7020-5e7d-01776e7c9903@powerlamerz.org> <20170427231242.GA5138@metamorpher.de> Mime-Version: 1.0 Content-Type: text/plain; charset=windows-1252 Content-Transfer-Encoding: 8bit Return-path: In-Reply-To: <20170427231242.GA5138@metamorpher.de> Sender: linux-raid-owner@vger.kernel.org To: Andreas Klauer Cc: Brad Campbell , linux-raid@vger.kernel.org List-Id: linux-raid.ids On 04/28/2017 01:12 AM, Andreas Klauer wrote: > On Thu, Apr 27, 2017 at 09:57:20PM +0200, Patrik Dahlström wrote: > The quick and dirty method is... grow using dd from 5disk raid (overlay) > to 6disk raid (no overlay) starting from the correct offset (verify!). > That resumes your reshape in an offline-ish, hackish manner, and once > it's done you have the whole thing. That's the theory anyway. > > Pseudocode: > > mdadm --create /dev/md5 --assume-clean /dev/overlay/{a,b,c} > mdadm --create /dev/md6 --assume-clean /dev/{a,b,c,d} # +1 drive I'm stuck at this step $ mdadm --create --assume-clean /dev/md1 --data-offset=126464K --level=5 --raid-devices=6 /dev/sda /dev/sdb /dev/sdd /dev/sdc /dev/sde /dev/sdf mdadm: cannot open /dev/sda: Device or resource busy My overlay setup is keeping /dev/sd[abdce] busy. How do I setup the overlay to keep it from occupying the disks? Overlays are currently created like this: $ dmsetup create ${b} --table "0 $size_bkl snapshot $d $loop P 8" Best regards // Patrik