I just uploaded mdadm ubuntu3 that will address this issue. It will be available in the archive within a few hours.
Fabio ** Changed in: mdadm (Ubuntu) Status: Confirmed => Fix Released -- Upgrading mdadm package is impossible - can't upgrade while raid arrays active https://launchpad.net/bugs/60623 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs