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RE: [Xen-users] Kernel raid bug on squeeze

  • To: "Simon Hobson" <linux@xxxxxxxxxxxxxxxx>, <xen-users@xxxxxxxxxxxxxxxxxxx>
  • From: "Ian Tobin" <itobin@xxxxxxxxxxxxx>
  • Date: Mon, 18 Jul 2011 21:27:41 +0100
  • Cc:
  • Delivery-date: Mon, 18 Jul 2011 13:28:31 -0700
  • List-id: Xen user discussion <xen-users.lists.xensource.com>
  • Thread-index: AcxFelg857ZI1Gv6RpaP2QqUpquBZgADrb4Q
  • Thread-topic: [Xen-users] Kernel raid bug on squeeze

Hi Simon,

Thanks for the info, ill do some testing tomorrow and let you know



-----Original Message-----
From: xen-users-bounces@xxxxxxxxxxxxxxxxxxx
[mailto:xen-users-bounces@xxxxxxxxxxxxxxxxxxx] On Behalf Of Simon Hobson
Sent: 18 July 2011 19:40
To: xen-users@xxxxxxxxxxxxxxxxxxx
Subject: Re: [Xen-users] Kernel raid bug on squeeze

Ian Tobin wrote:

>I'm having issues on intel and amd, when booting it doesn't assemble 
>the raid devices.  It seems to work ok in Lenny but when you upgrade to

>squeeze it won't boot.
>Anyone else with same issue?

I've recently just been getting into this mdraid stuff as I
rebuild/upgrade some hosts. During my experimentation, I did find that
you need the arrays to be defined in /etc/mdadm/mdadm.conf for them to
automatically build - and of course you need to update your initrd after
making any changes.

ARRAY /dev/md/main metadata=1.2 UUID<your array UID> name=<your array

I believe /usr/share/mdadm/mkconf shoudl make this automatically for

I spent a bit of time at a busybox prompt figuring this out ! But don't
take my word, I'm only a novice at this. In my case I didn't upgrade
from Lenny, I just wiped the storage (it was previously hardware raid,
and I upgraded disks) and did a fresh install of Squeeze.

I had this problem because I manually created the arrays before starting
the installer, because the installer doesn't seem to give you the
opportunity to name the arrays etc. So of course, because the installer
didn't build the arrays, I think it just missed the step of creating the
correct config file.
Simon Hobson

Visit http://www.magpiesnestpublishing.co.uk/ for books by acclaimed
author Gladys Hobson. Novels - poetry - short stories - ideal as
Christmas stocking fillers. Some available as e-books.

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