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 4D3E2C433F5 for ; Wed, 9 Mar 2022 03:00:05 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231579AbiCIDBB (ORCPT ); Tue, 8 Mar 2022 22:01:01 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:39676 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231497AbiCIDBA (ORCPT ); Tue, 8 Mar 2022 22:01:00 -0500 Received: from www18.qth.com (www18.qth.com [69.16.238.59]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 9619A13DE13 for ; Tue, 8 Mar 2022 19:00:01 -0800 (PST) Received: from [73.207.192.158] (port=42292 helo=justpickone.org) by www18.qth.com with esmtpsa (TLS1.2) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.94.2) (envelope-from ) id 1nRmYS-0007hj-H0 for linux-raid@vger.kernel.org; Tue, 08 Mar 2022 21:00:00 -0600 Date: Tue, 8 Mar 2022 21:59:58 -0500 From: David T-G To: Linux RAID Subject: Re: striping 2x500G to mirror 1x1T Message-ID: <20220309025958.GE4455@justpickone.org> References: <20220305044704.GB4455@justpickone.org> <9b00eff9-1540-228c-60af-d33c32e1b45a@sotapeli.fi> <20220309043447.70281a4d@nvm> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20220309043447.70281a4d@nvm> 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 Hi again, all -- ...and then Roman Mamedov said... % ... % And a very good point that Wols mentioned, the 1TB-disk member can be set as % --write-mostly, since the 2x500GB RAID0 is likely to overshoot the performance % of a single 1TB disk, even if its individual disks were slower. Not to mention % it has two independent head sets for the same amount of data. (If we're still % talking rotational here...) Thanks so much for all of the input! This sounds like the right way to go. I had completely forgotten the "strange magic" ;-) of RAID10 on just two drives by reordering the two partitions on the second drive, but I don't think that that applies here and I don't imagine it's worth the complexity of striping two mirrors, half of each of which are partitions on the 1T drive, so I'll just stripe [partions on] the two 500s. Thanks again & have a great day! :-D -- David T-G See http://justpickone.org/davidtg/email/ See http://justpickone.org/davidtg/tofu.txt