From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Marcin M. Jessa" Subject: Creating an md with 3TB drives. Date: Wed, 28 Sep 2011 10:05:19 +0200 Message-ID: <4E82D53F.3050409@yazzy.org> Reply-To: lists@yazzy.org Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; 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 guys. I have two 3TB drives and I want to set them up as RAID0. The problem is I can't use all of the space on them. I only get 4TB of the 6 in total. What I tried was: # parted /dev/sde GNU Parted 2.3 Using /dev/sde Welcome to GNU Parted! Type 'help' to view a list of commands. (parted) mklabel gpt Warning: The existing disk label on /dev/sde will be destroyed and all data on this disk will be lost. Do you want to continue? Yes/No? yes (parted) mkpart primary 0 -0 Warning: The resulting partition is not properly aligned for best performance. Ignore/Cancel? ignore (parted) print Model: ATA Hitachi HDS72303 (scsi) Disk /dev/sde: 3001GB Sector size (logical/physical): 512B/512B Partition Table: gpt Number Start End Size File system Name Flags 1 17.4kB 3001GB 3001GB primary (parted) quit Then I used fdisk to change the partition type to Linux raid auto Finally I ran mdadm --create /dev/md2 --level=0 --raid-devices=2 /dev/sdd1 /dev/sde1 but mdadm -QD /dev/md2 shows 2TBs are gone. Array Size : 4294964224 (4096.00 GiB 4398.04 GB) What to do in this case? How can I a 6TB raid array ? -- Marcin M. Jessa