On Thu, 9 May 2013 11:30:26 -0400 Dusty Mabe [off-list ref] wrote:

On Wed, May 8, 2013 at 1:39 PM, Dusty Mabe [off-list ref] wrote:

quoted

CentOS 6.3
2.6.32-279.19.1
mdadm-3.2.3-9.el6.x86_64


I have noticed that the device number printed in the mdstat file gets
changed if you fail->remove->add a member device of a 1.X metadata
array, but for a 0.90 metadata array the device will go back to the
original value once recovery has finished.


Is this by design? I know 1.X version of metadata use dev_roles rather
than this_disk and the mdp_disk_t structure so maybe it is by design?

Hey guys.. Sorry to be a pain. Has anyone seen this before? Is it by
design or a known issue?

It is an unfortunate consequence of incoherent design.
I've occasionally wondered if I should "fix" it.

NeilBrown