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 27357C433ED for ; Thu, 6 May 2021 12:38:10 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id E604760FD9 for ; Thu, 6 May 2021 12:38:09 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231673AbhEFMjH (ORCPT ); Thu, 6 May 2021 08:39:07 -0400 Received: from mail.thelounge.net ([91.118.73.15]:27049 "EHLO mail.thelounge.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230315AbhEFMjG (ORCPT ); Thu, 6 May 2021 08:39:06 -0400 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) server-digest SHA256) (No client certificate requested) (Authenticated sender: h.reindl@thelounge.net) by mail.thelounge.net (THELOUNGE MTA) with ESMTPSA id 4FbY5V2cP2zXN5; Thu, 6 May 2021 14:38:01 +0200 (CEST) To: d tbsky , Xiao Ni Cc: list Linux RAID References: <8626adeb-696c-7778-2d5e-0718ed6aefdb@redhat.com> From: Reindl Harald Organization: the lounge interactive design Subject: Re: raid10 redundancy Message-ID: <6db10ef4-e087-3940-4870-e5d9717b853f@thelounge.net> Date: Thu, 6 May 2021 14:38:01 +0200 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Thunderbird/78.8.1 MIME-Version: 1.0 In-Reply-To: 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 06.05.21 um 11:57 schrieb d tbsky: > if losing two disks will madam find out the raid can be rebuilded safely or not? it's pretty simple * if you lose the wrong disks all is gone * if you lsoe the right disks no problem RAID10 with 4 disk is prcatically a stripe over the data which is mirrored, wehn you lose two disks containg both mirrors of one of the stripes your data are done pretty easy to test - pull out two disks and move them to another machine, if you take the right ones you have on both a degraded RAID, can add two blank disks and resync it that's how i clone machines for years