Installing on RAID with Ubiquity [was: Proposal to drop Ubuntu alternate CDs for 12.10]

[Dmitrijs Ledkovs]

On 28/08/12 11:17, Robie Basak wrote:
> On Tue, Aug 28, 2012 at 08:42:26AM +0100, Dmitrijs Ledkovs wrote:
>> On 28/08/12 06:38, Martin Pitt wrote:
>>>  * After that, booting fails because the generated grub configuration
>>>    hardcodes /dev/md0p1, but initramfs/kernel create it as /dev/md127p1. 
>>>    It would be nice if grub/Ubiquity used UUIDs for the root partition
>>>    as usual; in the initramfs /dev/disks/by-uuid/... exists just fine.
>>>
>>
>> Why mdadm started to generate md127 instead of md0, I don't know. And
>> it's a bug I should look into.
> 
> This sounds like this bug: a race between udev workers and mdadm:
> 
> 	http://dev.bizo.com/2012/07/mdadm-device-or-resource-busy.html
> 	https://bugs.launchpad.net/ubuntu/+source/mdadm/+bug/1030354
> 

While this is true, and I now have assigned this bug to myself, I am not
sure how the two interacted during boot.

At boot, udev is incrementally assembling md arrays on ubuntu. So why
would it not create stable names?


-- 
Regards,
Dmitrijs.

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