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 267A6C7112B for ; Fri, 18 Aug 2023 08:39:05 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1358674AbjHRIij convert rfc822-to-8bit (ORCPT ); Fri, 18 Aug 2023 04:38:39 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:52554 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1358653AbjHRIiT (ORCPT ); Fri, 18 Aug 2023 04:38:19 -0400 Received: from relay8-d.mail.gandi.net (relay8-d.mail.gandi.net [IPv6:2001:4b98:dc4:8::228]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 5539E30F3 for ; Fri, 18 Aug 2023 01:38:18 -0700 (PDT) Received: by mail.gandi.net (Postfix) with ESMTPSA id CE5751BF205 for ; Fri, 18 Aug 2023 08:38:16 +0000 (UTC) Message-ID: <1e0a825cdacb2cbb1534516c64e08c649e4596bd.camel@gnu-log.net> Subject: dm-raid usage setup From: Benoit Gschwind To: linux-kernel@vger.kernel.org Date: Fri, 18 Aug 2023 10:38:15 +0200 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: 8BIT User-Agent: Evolution 3.48.3 MIME-Version: 1.0 X-GND-Sasl: gschwind@gnu-log.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hello, Is it fine and sane to stack raid device using dm-raid, i.e. raid-0 above raid-6 ? Is it fine and sane to use raid-0 for the raid-6 journal ? Is it fine and sane to use same disks into several different raid, i.e. splitting disk into two or more partitions and using this partitions as disk for different raid ? Thanks by advance