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 X-Spam-Level: X-Spam-Status: No, score=-3.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id DC6B4C3E8C5 for ; Sun, 29 Nov 2020 17:06:36 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 8BE5B207FF for ; Sun, 29 Nov 2020 17:06:36 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726309AbgK2RGU (ORCPT ); Sun, 29 Nov 2020 12:06:20 -0500 Received: from static.214.254.202.116.clients.your-server.de ([116.202.254.214]:41596 "EHLO ciao.gmane.io" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725468AbgK2RGU (ORCPT ); Sun, 29 Nov 2020 12:06:20 -0500 Received: from list by ciao.gmane.io with local (Exim 4.92) (envelope-from ) id 1kjQ8o-0005Bo-Ri for linux-raid@vger.kernel.org; Sun, 29 Nov 2020 18:05:38 +0100 X-Injected-Via-Gmane: http://gmane.org/ To: linux-raid@vger.kernel.org From: Doug Herr Subject: Re: Assemble RAID on new machine but with missing devices Date: Sun, 29 Nov 2020 17:05:33 -0000 (UTC) Message-ID: References: <4CjVhl4nSbz6tm9@submission01.posteo.de> Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit User-Agent: Pan/0.146 (Hic habitat felicitas; 8107378 git@gitlab.gnome.org:GNOME/pan.git) Precedence: bulk List-ID: X-Mailing-List: linux-raid@vger.kernel.org On Sat, 28 Nov 2020 00:10:14 +0100, c.buhtz wrote: > Then I want to bring the RAID1 online again on the new machine but with > one existing and one missing drive. As example, after creating and then stopping md8 I restarted it with only one of the members. Mdadm told me how to force it... [root@wombat looptesting]# mdadm --assemble /dev/md8 /dev/loop1 mdadm: /dev/md8 assembled from 1 drive - need all 2 to start it (use -- run to insist). [root@wombat looptesting]# mdadm --assemble /dev/md8 /dev/loop1 --run mdadm: /dev/md8 has been started with 1 drive (out of 2). -- Doug Herr -- Doug Herr