Make sure you have the updated mdadm, grub and other packages that fix the boot degraded raid array bugs in hardy. They also change the timings. you can also dpkg-reconfigure mdadm or edit the relevant scripts in /etc/initramfs/ for mdadm.
Dave -- SLUG - Sydney Linux User's Group Mailing List - http://slug.org.au/ Subscription info and FAQs: http://slug.org.au/faq/mailinglists.html
