From mboxrd@z Thu Jan 1 00:00:00 1970 From: Wols Lists Subject: Re: failed disks, mapper, and "Invalid argument" Date: Thu, 21 May 2020 09:13:13 +0100 Message-ID: <5EC63819.5010508@youngman.org.uk> References: <20200520200514.GE1415@justpickone.org> <5EC5BBEF.7070002@youngman.org.uk> <20200520235347.GF1415@justpickone.org> Mime-Version: 1.0 Content-Type: text/plain; charset=windows-1252 Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <20200520235347.GF1415@justpickone.org> Sender: linux-raid-owner@vger.kernel.org To: David T-G , Linux RAID list List-Id: linux-raid.ids On 21/05/20 00:53, David T-G wrote: > diskfarm:root:13:/mnt/scratch/disks> mdadm --assemble --force /dev/md0 --verbose /dev/sda1 /dev/sdb1 /dev/sdc1 > mdadm: looking for devices for /dev/md0 > mdadm: /dev/sda1 is busy - skipping > mdadm: /dev/sdb1 is busy - skipping > mdadm: /dev/sdc1 is busy - skipping > > like the overlay is keeping me from the raw devices, so I'd have to tear > down all of that to try the real thing. I'll h old off on that... Did you do an mdadm --stop before trying the force assemble? That implies to me you've got the remnants of a previous attempt lying around... Not sure which command it is - "cat /proc/mdstat" maybe, but make sure ALL your arrays are stopped (unless you know they are running okay) before you try stuff. Cheers, Wol