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 1C0A8C43217 for ; Sun, 27 Nov 2022 14:58:57 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229526AbiK0O64 (ORCPT ); Sun, 27 Nov 2022 09:58:56 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:47492 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229475AbiK0O6y (ORCPT ); Sun, 27 Nov 2022 09:58:54 -0500 Received: from mail.stoffel.org (mail.stoffel.org [172.104.24.175]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 3F6E2F5BD for ; Sun, 27 Nov 2022 06:58:53 -0800 (PST) Received: from quad.stoffel.org (068-116-170-226.res.spectrum.com [68.116.170.226]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by mail.stoffel.org (Postfix) with ESMTPSA id F30E720568; Sun, 27 Nov 2022 09:58:51 -0500 (EST) Received: by quad.stoffel.org (Postfix, from userid 1000) id 4B0FEA80D6; Sun, 27 Nov 2022 09:58:51 -0500 (EST) MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Message-ID: <25475.31531.261178.346567@quad.stoffel.home> Date: Sun, 27 Nov 2022 09:58:51 -0500 From: "John Stoffel" To: Reindl Harald Cc: John Stoffel , Wols Lists , David T-G , Linux RAID list Subject: Re: how do i fix these RAID5 arrays? In-Reply-To: References: <20221123220736.GD19721@jpo> <20221124032821.628cd042@nvm> <20221124211019.GE19721@jpo> <25474.28874.952381.412636@quad.stoffel.home> X-Mailer: VM 8.2.0b under 27.1 (x86_64-pc-linux-gnu) Precedence: bulk List-ID: X-Mailing-List: linux-raid@vger.kernel.org >>>>> "Reindl" == Reindl Harald writes: > Am 26.11.22 um 21:02 schrieb John Stoffel: >> I call it a failure of the layering model. If you want RAID, use MD. >> If you want logical volumes, then put LVM on top. Then put >> filesystems into logical volumes. >> >> So much simpler... > have you ever replaced a 6 TB drive and waited for the resync of > mdadm in the hope in all that hours no other drive goes down? Yes, but I also run RAID6 so that if I lose a drive, I don't lose redundancy. I also have backups. > when your array is 10% used it's braindead > when your array is new and empty it's braindead > ZFS/BTRFS don't neeed to mirror/restore 90% nulls I like the idea of ZFS, but in my $WORK experience with Oracle ZFS arrays, it tended to fall off a cliff performance wise when pushed too hard. And I don't like that you can only grow, not shrink zvols and the underlying storage. But I'm also not smart enough to design a filesystem and make it work. :-)