I have been advised on the linux-raid mailing list [1] that this problem is more likely to be caused by mkinitrd than by mdadm, and that I should therefore file a bug against initramfs-tools.
[1]: http://marc.info/?l=linux-raid&m=123421650832520&w=2 ** Also affects: initramfs-tools Importance: Undecided Status: New -- mdadm does not add spares to arrays on boot https://bugs.launchpad.net/bugs/252365 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs