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=-5.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,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 6D100C64E7B for ; Tue, 1 Dec 2020 08:43:02 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id A12792054F for ; Tue, 1 Dec 2020 08:43:01 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=posteo.de header.i=@posteo.de header.b="PqmW7Cb+" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728793AbgLAImq (ORCPT ); Tue, 1 Dec 2020 03:42:46 -0500 Received: from mout01.posteo.de ([185.67.36.65]:59065 "EHLO mout01.posteo.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726755AbgLAImp (ORCPT ); Tue, 1 Dec 2020 03:42:45 -0500 Received: from submission (posteo.de [89.146.220.130]) by mout01.posteo.de (Postfix) with ESMTPS id B14A316005C for ; Tue, 1 Dec 2020 09:41:48 +0100 (CET) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=posteo.de; s=2017; t=1606812108; bh=TrsJOpVR7Ju7Oqw/22Li4RbPb1G0O33b+KBW4RfgBnU=; h=Date:From:To:Cc:Subject:From; b=PqmW7Cb+ZTjBsaKWIgFUCnSd9jl4KPjnFvfgPKXvwxjtwZ/dcGsQVbQEMJifk2HhN wJzVFbuEJn0jX7c8JF2xi7S3E58pKQiwSmt9eeYjDtPJM+vefn7Fr7tEkiC2ug4Ic4 YI2PySrFAFbTDMi+j7SACmHl+4ifCKrlif03mfZJGCjJc/O0wSWjdn/23f+EbqeLjA kpkwlAhTiJUgpF2j/FcRI2/yMtpaqMu9hdckGA/OIyqQFU94lLj7/hoTNwTDWXm5la RPrhR3f6ofLgEJU6BNW25BiczcT6jB3+G2DtCaCOsTBW2idm5vs0c5/rIHhm9QmpUT v04gCzZzvaW1Q== Received: from customer (localhost [127.0.0.1]) by submission (posteo.de) with ESMTPSA id 4ClbDr1BN0z9rxP; Tue, 1 Dec 2020 09:41:47 +0100 (CET) MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII; format=flowed Content-Transfer-Encoding: 7bit Date: Tue, 01 Dec 2020 09:41:47 +0100 From: buhtz@posteo.de To: David T-G Cc: linux-raid@vger.kernel.org Subject: re: partitions & filesystems (was "Re: =?UTF-8?Q?=3F=3F=3Froot=20?= =?UTF-8?Q?account=20locked=3F=3F=3F=20after=20removing=20one=20RAID=31=20?= =?UTF-8?Q?hard=20disc=22=29?= In-Reply-To: <20201130200503.GV1415@justpickone.org> References: <20201130200503.GV1415@justpickone.org> Message-ID: <8fa1ae68716e406423039419f10ec219@posteo.de> X-Sender: buhtz@posteo.de User-Agent: Posteo Webmail Precedence: bulk List-ID: X-Mailing-List: linux-raid@vger.kernel.org Dear David and others, thanks a lot for so much discussion and details. I learn a lot. Following your discussions I see there still is some basic knowledge missing on my side. Am 30.11.2020 21:05 schrieb David T-G: > You don't see any "filesystem" or, more correctly, partition in your > > fdisk -l I do not see the partition in the output of "fdisk -l". But I can (when both discs are present) mount /dev/md127 (manualy via mount and via fstab) to /Daten and create files on it. > So the display isn't interesting, although the logic behind that > approach > certainly is to me. I plugged in the nacked hard discs and they appear as /dev/sdb and /dev/sdc. After that mdadm --create /dev/md/md0 --level=1 --raid-devices=2 /dev/sdb /dev/sdc Then I did ls -l /dev/md/md0 and found out this is just a link to /dev/md127. I formated the raid with mkdfs.ext4 /dev/md127 Then I mounted (first manually via mount and after sucess via fstab) /dev/md127 to /Daten Is this unusual?