From mboxrd@z Thu Jan 1 00:00:00 1970 From: Hans Kraus Subject: mdadm Raid level change from 1 to 5? Date: Fri, 08 May 2015 11:18:44 +0200 Message-ID: <554C7F74.5010404@hanswkraus.com> Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 7bit Return-path: Sender: linux-raid-owner@vger.kernel.org To: linux-raid@vger.kernel.org List-Id: linux-raid.ids Hi, I have a Raid 1 with 3 drives, the following layout (the internal bitmap is already removed): ----------------------------------------------------------------- md20 : active raid1 sdj1[2] sdi1[1] sdn1[0] 732442432 blocks super 1.2 [3/3] [UUU] ----------------------------------------------------------------- I tried to change it to Raid 5, but I'm getting aways an error. ----------------------------------------------------------------- mdadm --grow /dev/md20 --level=5 --raid-devices=3 -c 32 \ --backup-file=/home/kraush/work/raidLevelChange Impossibly level change request for RAID1 ----------------------------------------------------------------- I tried it with various permutations (+/- raid-devices, c, ...). Is something in my command wrong or is the level change not possible? This is on Debian 7, mdadm - v3.3-65-g2167de7 - 11th March 2014 Regards, Hans