From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 231C2ECAAD2 for ; Sun, 28 Aug 2022 09:54:47 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229494AbiH1Jyq (ORCPT ); Sun, 28 Aug 2022 05:54:46 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:40644 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229448AbiH1Jyp (ORCPT ); Sun, 28 Aug 2022 05:54:45 -0400 Received: from smtp.hosts.co.uk (smtp.hosts.co.uk [85.233.160.19]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id C30D23D5B8 for ; Sun, 28 Aug 2022 02:54:43 -0700 (PDT) Received: from host86-128-157-135.range86-128.btcentralplus.com ([86.128.157.135] helo=[192.168.1.218]) by smtp.hosts.co.uk with esmtpa (Exim) (envelope-from ) id 1oSF06-0003vI-3q; Sun, 28 Aug 2022 10:54:42 +0100 Message-ID: Date: Sun, 28 Aug 2022 10:54:41 +0100 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:91.0) Gecko/20100101 Thunderbird/91.13.0 Subject: Re: RAID 6, 6 device array - all devices lost superblock Content-Language: en-GB From: Wols Lists To: Peter Sanders , linux-raid@vger.kernel.org Cc: Phil Turmel , NeilBrown References: <70e2ae22-bbba-77a4-c9bc-4c02752f4cb7@youngman.org.uk> In-Reply-To: <70e2ae22-bbba-77a4-c9bc-4c02752f4cb7@youngman.org.uk> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Precedence: bulk List-ID: X-Mailing-List: linux-raid@vger.kernel.org On 28/08/2022 10:14, Wols Lists wrote: >> Currently I have no /dev/md* devices. >> I have access to the old mdadm.conf file - have tried assembling with >> it, with the default mdadm.conf, and with no mdadm.conf file in /etc >> and /etc/mdadm. > > It looks like the drives weren't partitioned :-( I think you're into > forensics. Whoops - my system froze while I was originally writing my reply, and I forgot to put this into my rewrite ... Look up overlays in the wiki. I've never done it myself, but a fair few people have said the instructions worked a treat. You're basically making the drives read-only (all writes get dumped into the overlay file), and then re-creating the array over the top, so you can test whether you got it right. If you don't, you just ditch the overlays and start again, if you did get it right you can recreate the array for real. Cheers, Wol