From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Marcin M. Jessa" Subject: Re: Creating an md with 3TB drives. Date: Wed, 28 Sep 2011 17:09:00 +0200 Message-ID: <4E83388C.9010308@yazzy.org> References: <4E82D53F.3050409@yazzy.org> <20110928182302.39cfd4b0@notabene.brown> <4E82DB7D.4050104@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: In-Reply-To: Sender: linux-raid-owner@vger.kernel.org To: David Brown Cc: linux-raid@vger.kernel.org List-Id: linux-raid.ids On 9/28/11 10:43 AM, David Brown wrote: > On 28/09/2011 10:31, Marcin M. Jessa wrote: >> On 9/28/11 10:23 AM, NeilBrown wrote: >> [...] >> >>>> >>>> Then I used fdisk to change the partition type to Linux raid auto >>> >>> You can do that if you like but it will have no effect. The "raid auto" >>> partition type only means anything on MBR partitions. You don't need >>> to, so >>> don't bother. >> >> Thanks Neil. >> Not using fdisk worked like a charm. >> > > Using fdisk probably resulted in the disks going over to MBR rather than > GPT, and thus you have a 2TB limit. > > By the way, you should probably try the parted again and fix the > alignment issue (rather than just "ignoring" it) - it will make a /big/ > difference. In terms of speed? This RAID array is temporarily just so I can back up/restore my broken 5x2TB RAID6 but it would be interesting to know what to do. I was running # parted -a optimal /dev/sdd which was suppose to fix that warning but it didn't. -- Marcin M. Jessa