Re: Accesses to not yet running array

[Martin Wilck <mwilck@arcor.de>]

On 08/24/2013 02:42 PM, Francis Moreau wrote:
> On Sat, Aug 24, 2013 at 2:40 PM, Francis Moreau <francis.moro@gmail.com> wrote:
>> Hello Martin,
>>
>> On Fri, Aug 23, 2013 at 9:09 PM, Martin Wilck <mwilck@arcor.de> wrote:
>>> On 08/23/2013 12:00 PM, Francis Moreau wrote:
>>>
>>>> [ adding Martin in CC since it seems related to DDF... ]
>>>
>>> I reproduced it here. The problem is that mdmon isn't running. Simply
>>> try running "mdmon /dev/md127", and the mount should proceed.
>>>
>>
>> oh, ok, I should have noticed.
>>
>>> You'd avoid the problem by running "mdadm -IR /dev/sda" in the first place.
>>
>> Actually this is how arrays are assembled during boot on some
>> distributions (Fedora for example).
> 
> I meant the sequence:
> 
> mdadm -I /dev/sda
> mdadm -I /dev/sdb
> mdadm -R /dev/mdxxx
> 
> is used by distribution.

CentOS 6 uses the following sequence:

mdadm -I /dev/sda
mdadm -I /dev/sdb
mdadm -I /dev/mdXXX

I don't see mdadm -R anywhere on CentOS.
You could change your udev rules to run "mdadm -IR /dev/mdXXX" instead.
Have you tried that?

I wonder if that woudn't be smarter anyway. Neil?

Martin