From mboxrd@z Thu Jan 1 00:00:00 1970 From: Roberto Nunnari Subject: Re: replacing drives Date: Thu, 02 May 2013 15:56:54 +0200 Message-ID: <518270A6.4090706@supsi.ch> References: <517A8EB5.8080100@supsi.ch> <20130426155347.GA9928@cthulhu.home.robinhill.me.uk> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <20130426155347.GA9928@cthulhu.home.robinhill.me.uk> Sender: linux-raid-owner@vger.kernel.org To: Roberto Nunnari , "linux-raid@vger.kernel.org" List-Id: linux-raid.ids Robin Hill wrote: > The safest option would be: > - add in the new disks > - partition to at least the same size as your existing partitions (they > can be larger) > - add the new partitions into the arrays (they'll go in as spares) > - grow the arrays to 4 members (this avoids any loss of redundancy) > - wait for the resync to complete > - install grub/lilo/syslinux to the new disks Ok.. got here. > - fail and remove the old disk partitions from the arrays Now.. I may need some guidance for the next steps.. please correct me if I'm wrong.. to fail the old disk partition from the arrays I should: mdadm -f /dev/md0 /dev/sda1 mdadm -f /dev/md1 /dev/sda2 mdadm -f /dev/md2 /dev/sda3 mdadm -f /dev/md0 /dev/sdc1 mdadm -f /dev/md1 /dev/sdc2 mdadm -f /dev/md2 /dev/sdc3 and to remove the old disk partition from the arrays I should: mdadm -r /dev/md0 /dev/sda1 mdadm -r /dev/md1 /dev/sda2 mdadm -r /dev/md2 /dev/sda3 mdadm -r /dev/md0 /dev/sdc1 mdadm -r /dev/md1 /dev/sdc2 mdadm -r /dev/md2 /dev/sdc3 correct? > - shrink the arrays back down to 2 members to shrink the arrays back down to two members: mdadm --grow --raid-devices=2 /dev/md0 mdadm --grow --raid-devices=2 /dev/md1 mdadm --grow --raid-devices=2 /dev/md2 correct? Thank you very much for your precious help! Robi