On Sat, 24 Aug 2013 20:41:19 +0200 Martin Wilck [off-list ref] wrote:

On 08/24/2013 02:42 PM, Francis Moreau wrote:

quoted

On Sat, Aug 24, 2013 at 2:40 PM, Francis Moreau [off-list ref] wrote:

quoted

Hello Martin,

On Fri, Aug 23, 2013 at 9:09 PM, Martin Wilck [off-list ref] wrote:

quoted

On 08/23/2013 12:00 PM, Francis Moreau wrote:

quoted

[ 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.

quoted

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?

I don't think you want the udev rules to run "mdadm -IR ...".

If 'mdadm -IR...' to be run at all, it should probably be
   mdadm -IRs

and it should happen after all attached busses have been scanned and udev has
processed all new devices.

NeilBrown