From mboxrd@z Thu Jan 1 00:00:00 1970 From: Peter Rabbitson Subject: Re: No md superblock immediately after creating RAID 5 /dev/md0 Date: Thu, 28 Aug 2008 12:07:57 +0200 Message-ID: <48B678FD.1050801@rabbit.us> References: <8CAD6FFC01AB7AC-524-231A@webmail-nf07.sim.aol.com> Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <8CAD6FFC01AB7AC-524-231A@webmail-nf07.sim.aol.com> Sender: linux-raid-owner@vger.kernel.org To: thomas62186218@aol.com Cc: linux-raid@vger.kernel.org List-Id: linux-raid.ids thomas62186218@aol.com wrote: > Hi all, > > I am struggling with an issue on an Ubuntu 8.0.4 64-bit system. The > system has 12 SATA drives. I create a RAID 5 array using mdadm as follows: > > mdadm -Cv /dev/md0 -n12 -l5 -c128 /dev/sd[b-m] -R -f > As a side note, what you are about to do is sheer madness. At least use RAID6. Search for raid5 in the list archives for a number of discussions why using RAID5 with a large number of disks is rather shortsighted. HTH Peter