From mboxrd@z Thu Jan 1 00:00:00 1970 From: Troy Telford Subject: Re: RAID-6 disk superblock issue Date: Wed, 14 Dec 2011 14:41:52 -0700 Message-ID: References: <4EE8F26D.7010608@turmel.org> Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII; 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 On 2011-12-14 19:01:01 +0000, Phil Turmel said: > Hi Troy, > > On 12/13/2011 05:42 PM, Troy Telford wrote: > > Let me guess: You have version 0.90 superblock, and sdl1 covers the > whole device? sdl1 does cover the entire device, but I'm fairly certain I do not have a 0.90 superblock (Unless 0.90 was the standard version for Linux 2.6 about two years ago.) Unfortunately, I'm not sure how to get my current superblock version: $ sudo mdadm --examine /dev/md2 mdadm: No md superblock detected on /dev/md2. I find it curious that I can't detect the superblock for the MD device, even though the device is up, active, and working. > Short term, change your mdadm.conf to only accept device names that end > with a digit. Like so: > > DEVICE /dev/sd[a-z][1-9] OK, I'll give that a whirl. For the record, it was DEVICE partitions previously. > Then rebuild your initramfs to include the new mdadm.conf. > > Long term, rebuild your array with v1.x metadata. You know, I was hoping to be able to wait until btrfs handles RAID-6 (or "raid-z") arrays by the time I had to rebuild the array. I guess I'm not that lucky. -- Troy Telford