From mboxrd@z Thu Jan  1 00:00:00 1970
From: Goswin von Brederlow <goswin-v-b@web.de>
Subject: mdadm can't reshape/resize arrays
Date: Wed, 24 Jun 2009 17:03:38 +0200
Message-ID: <878wjh4qt1.fsf@frosties.localdomain>
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Return-path: <linux-raid-owner@vger.kernel.org>
Sender: linux-raid-owner@vger.kernel.org
To: linux raid <linux-raid@vger.kernel.org>
List-Id: linux-raid.ids

Hi,

I'm trying to resize/reshape some of my arrays:

md1 : active raid1 sdc5[1]
      9767424 blocks [2/1] [_U]
      bitmap: 48/150 pages [192KB], 32KB chunk

% mdadm --grow --size max /dev/md1
mdadm: Cannot set device size for /dev/md1: Device or resource busy

and dmesg says:
  md: couldn't update array info. -16


md2 : active raid5 sdc2[6](S) sde2[3] sdg1[1] sdf3[4] sdd1[5] sdb1[2]
sda1[0]
      945625280 blocks level 5, 64k chunk, algorithm 2 [6/6] [UUUUUU]
      bitmap: 0/181 pages [0KB], 512KB chunk

% mdadm --grow -n 7 /dev/md2 
mdadm: Need to backup 1920K of critical section..
mdadm: Cannot set device size/shape for /dev/md2: Device or resource busy

and dmesg says:
  md: couldn't update array info. -16


% uname -a
Linux frosties 2.6.29.4-frosties-1 #8 Sun Jun 7 00:48:55 CEST 2009 x86_64 GNU/Linux

% mdadm --version
mdadm - v2.6.9 - 10th March 2009


Anyone have an idea what is wrong there?

MfG
        Goswin