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 ED7ABC352A1 for ; Sat, 3 Dec 2022 05:41:38 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229537AbiLCFlg (ORCPT ); Sat, 3 Dec 2022 00:41:36 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:39280 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229458AbiLCFlf (ORCPT ); Sat, 3 Dec 2022 00:41:35 -0500 Received: from www18.qth.com (www18.qth.com [69.16.238.59]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 48FDCD4B for ; Fri, 2 Dec 2022 21:41:33 -0800 (PST) Received: from [73.207.192.158] (port=34128 helo=jpo) by www18.qth.com with esmtpsa (TLS1.2) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.95) (envelope-from ) id 1p1LHI-000473-DJ for linux-raid@vger.kernel.org; Fri, 02 Dec 2022 23:41:32 -0600 Date: Sat, 3 Dec 2022 05:41:30 +0000 From: David T-G To: Linux RAID list Subject: md vs LVM and VMs and ... (was "Re: md RAID0 can be grown (was ...") Message-ID: <20221203054130.GP19721@jpo> Reply-To: Linux RAID list References: <20221123220736.GD19721@jpo> <20221124032821.628cd042@nvm> <20221124211019.GE19721@jpo> <512a4cdd-9013-e158-7c77-7409cd0dc3a1@youngman.org.uk> <20221125132259.GG19721@jpo> <20221125194932.GK19721@jpo> <20221128142422.GM19721@jpo> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.10.1 (2018-07-13) X-AntiAbuse: This header was added to track abuse, please include it with any abuse report X-AntiAbuse: Primary Hostname - www18.qth.com X-AntiAbuse: Original Domain - vger.kernel.org X-AntiAbuse: Originator/Caller UID/GID - [47 12] / [47 12] X-AntiAbuse: Sender Address Domain - justpickone.org X-Get-Message-Sender-Via: www18.qth.com: authenticated_id: dmail@justpickone.org X-Authenticated-Sender: www18.qth.com: dmail@justpickone.org X-Source: X-Source-Args: X-Source-Dir: Precedence: bulk List-ID: X-Mailing-List: linux-raid@vger.kernel.org Jani, et al -- ...and then Jani Partanen said... % Hi David, % % Nice to see that there is others who like to take things extreme and live on % razor edge. ;) Heh. And here I didn't know I was doing any such thing ... My whole goal was to minimize rebuild time for anything less than a full disk and to stage rebuilds for a full-disk failure. If these were all 100M or 1T disks then we wouldn't be worrying about rebuild time :-/ % % I had different side disks, so I made raid5 so that I first joined example % 1TB and 2TB together with md linear so I could add that as member to other % 3TB raid5 pool. The good news here is that I don't mix disk sizes; all of these are not only the same size but, for the foreseeable future, the exact same model. % ... % Anyway, go LVM if you are planning to slice and dice disks like before. With % LVM later on if you add space, it will be much more simple task and LVM % automaticly works like linear but offers much other benefits. I'll definitely read up on it and see where I might play with learning. % LVM is very much worth to learn. Start up virtual machine and assign % multiple small vdisks to it and you have enviroment where it's safe to play % around with md and lvm. [snip] Funny you should mention that ... Getting into VMs has been on my list for quite a while *sigh* :-)/2 I haven't even had the time and opportunity to go and read a primer to boot a "Hello, world" VM. Thanks again & HANN :-D -- David T-G See http://justpickone.org/davidtg/email/ See http://justpickone.org/davidtg/tofu.txt