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 7C448C6FA82 for ; Tue, 13 Sep 2022 10:40:07 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231685AbiIMKkG (ORCPT ); Tue, 13 Sep 2022 06:40:06 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:43858 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231668AbiIMKkE (ORCPT ); Tue, 13 Sep 2022 06:40:04 -0400 Received: from smtp-delay1.nerim.net (mailhost-j0-m1.nerim-networks.com [78.40.49.167]) by lindbergh.monkeyblade.net (Postfix) with ESMTP id F046017E23 for ; Tue, 13 Sep 2022 03:39:58 -0700 (PDT) Received: from mallaury.nerim.net (smtp-102-tuesday.noc.nerim.net [178.132.17.102]) by smtp-delay1.nerim.net (Postfix) with ESMTP id 6FF71C7AAD for ; Tue, 13 Sep 2022 12:39:57 +0200 (CEST) Received: from [192.168.0.247] (plouf.fr.eu.org [213.41.155.166]) by mallaury.nerim.net (Postfix) with ESMTP id EE7E2DB189; Tue, 13 Sep 2022 12:39:51 +0200 (CEST) Message-ID: <0023fefe-aad1-e692-48dd-e354497f6e41@plouf.fr.eu.org> Date: Tue, 13 Sep 2022 12:39:50 +0200 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:91.0) Gecko/20100101 Thunderbird/91.13.0 Subject: Re: change UUID of RAID devcies Content-Language: en-US To: Reindl Harald , Linux RAID Mailing List References: <2341a2a9-b86e-f0e5-784a-05dbd474dec5@thelounge.net> <729bdc01-b0ae-887a-6d2a-5135d287636c@youngman.org.uk> <05a1161b-d798-c68f-d37c-a9fc373c6e73@thelounge.net> From: Pascal Hambourg Organization: Plouf ! In-Reply-To: <05a1161b-d798-c68f-d37c-a9fc373c6e73@thelounge.net> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Precedence: bulk List-ID: X-Mailing-List: linux-raid@vger.kernel.org On 13/09/2022 at 12:28, Reindl Harald wrote: > > BTW: currently the machines are BIOS-boot - am i right that the 2 TB > limitation only requires that the parts which are needed for booting are > on the first 2 TB and i can use 4 TB SSD's on the two bigger machines? Which 2 TB limitation ? EDD BIOS calls use 64-bit LBA and should not have any practical limitation unless the BIOS implementation is flawed. > in that case i think i would need GPT partitioning and does GRUB2 > support booting from GPT-partitioned disks in BIOS-mode? Yes, but it requires a "BIOS boot" partition for the core image (usually less than 100 kB, so 1 MB is plenty enough). Also some flawed BIOS require that a legacy partition entry in the protective MBR has the "boot" flag set.