Comment 34 for bug 603582

RnSC, this means mdadm is at version 3.1.4 in natty, which was just recently opened for development, and will eventually become Ubuntu 11.04.

Once this new version of mdadm is tested on natty, its possible it could be backported to earlier releases.

Now that it is in the dev version, you can start now, but I'd recommend helping to test it on natty before you request a backport:

https://help.ubuntu.com/community/UbuntuBackports#How to request new packages