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=-5.3 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,NICE_REPLY_A,SPF_HELO_NONE, SPF_PASS,USER_AGENT_SANE_1 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 756C0C63777 for ; Mon, 30 Nov 2020 21:50:38 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 1C08620857 for ; Mon, 30 Nov 2020 21:50:38 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730332AbgK3Vuh (ORCPT ); Mon, 30 Nov 2020 16:50:37 -0500 Received: from mail.thelounge.net ([91.118.73.15]:22409 "EHLO mail.thelounge.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726158AbgK3Vuh (ORCPT ); Mon, 30 Nov 2020 16:50:37 -0500 Received: from srv-rhsoft.rhsoft.net (rh.vpn.thelounge.net [10.10.10.2]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (P-256)) (No client certificate requested) (Authenticated sender: h.reindl@thelounge.net) by mail.thelounge.net (THELOUNGE MTA) with ESMTPSA id 4ClJmf47DwzXVl; Mon, 30 Nov 2020 22:49:54 +0100 (CET) To: antlists , David T-G , linux-raid@vger.kernel.org References: <20201130200503.GV1415@justpickone.org> <01a571de-8ae8-3d9e-6f3d-16555ad93ea3@youngman.org.uk> From: Reindl Harald Organization: the lounge interactive design Subject: Re: partitions & filesystems (was "Re: ???root account locked??? after removing one RAID1 hard disc") Message-ID: <2d0fcd02-9e3a-d11a-a1cf-a47c1b6ce2c3@thelounge.net> Date: Mon, 30 Nov 2020 22:49:54 +0100 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Thunderbird/78.5.0 MIME-Version: 1.0 In-Reply-To: <01a571de-8ae8-3d9e-6f3d-16555ad93ea3@youngman.org.uk> Content-Type: text/plain; charset=utf-8; format=flowed Content-Language: en-US Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-raid@vger.kernel.org Am 30.11.20 um 21:51 schrieb antlists: > On 30/11/2020 20:05, David T-G wrote: >> You don't see any "filesystem" or, more correctly, partition in your >> >>    fdisk -l >> >> output because you have apparently created your filesystem on the entire >> device (hey, I didn't know one could do that!). > > That, actually, is the norm. It is NOT normal to partition a raid array it IS normal for several reasons * you may end with a replacement disk which is subtle smaller and hence you normally make the partition a little smaller then the device * in case of SSD you reserve some space for better wear-levelling * in case you ever need to reinstall your OS you want your data not in the same filesystem