From mboxrd@z Thu Jan 1 00:00:00 1970 From: Peter Rabbitson Subject: Re: In this partition scheme, grub does not find md information? Date: Tue, 29 Jan 2008 17:34:05 +0100 Message-ID: <479F557D.20502@rabbit.us> References: <479EAF42.6010604@pobox.com> <18334.46306.611615.493031@notabene.brown> <479F07E1.7060408@pobox.com> <479F0AAB.3090702@rabbit.us> <479F331F.7080902@msgid.tls.msk.ru> <479F3C74.1050605@rabbit.us> <479F42A5.8040007@msgid.tls.msk.ru> <479F5177.6060206@pobox.com> Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <479F5177.6060206@pobox.com> Sender: linux-raid-owner@vger.kernel.org To: Moshe Yudkowsky Cc: Michael Tokarev , linux-raid@vger.kernel.org List-Id: linux-raid.ids Moshe Yudkowsky wrote: > Here's a baseline question: if I create a RAID10 array using default > settings, what do I get? I thought I was getting RAID1+0; am I really? Maybe you are, depending on your settings, but this is beyond the point. No matter what 1+0 you have (linux, classic, or otherwise) you can not boot from it, as there is no way to see the underlying filesystem without the RAID layer. With the current state of affairs (available mainstream bootloaders) the rule is: Block devices containing the kernel/initrd image _must_ be either: * a regular block device (/sda1, /hda, /fd0, etc.) * or a linux RAID 1 with the superblock at the end of the device (0.9 or 1.2) > My superblocks, by the way, are marked version 01; my metadata in > mdadm.conf asked for 1.2. I wonder what I really got. This is how you find the actual raid version: mdadm -D /dev/md[X] | grep Version This will return a string of the form XX.YY.ZZ. Your superblock version is XX.YY.