From mboxrd@z Thu Jan 1 00:00:00 1970 From: Phil Turmel Subject: Re: Raid5 drive fail during grow and no backup Date: Sat, 01 Nov 2014 23:22:04 -0400 Message-ID: <5455A35C.2060000@turmel.org> References: Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: Sender: linux-raid-owner@vger.kernel.org To: Vince , linux-raid@vger.kernel.org List-Id: linux-raid.ids On 10/31/2014 09:34 AM, Vince wrote: > Hi, > > got a drive failure (bad block) during Raid5 grow (4x3TB -> 5x3TB). > Well... i don't have a backup file :/ > Mdadm shows 1 drive as removed. > > All 4 'good' drives are in the same reshape pos'n. > > Any idea how to finish the reshape process? Or get the array back? mdadm --stop /dev/md0 mdadm --assemble --force --verbose /dev/md0 /dev/sd[bcdf] If that doesn't work, please show us the output. You haven't (yet) lost your array. It's just degraded. You should investigate why the one drive was kicked out of the array instead of being rewritten properly (green drives?). In the meantime, assembly with --force should give you access to the data to grab anything critically important. If you share the output of "smartctl -x /dev/sdX" for at least the kicked drive, we can offer further advice. Regards, Phil