Hi, I confirm that this appears to be an issue.
I upgraded from Wheezy to Jessie today whilst also swapping out two drives for new ones (4 drive RAID-10 array). The boot sequence wouldn't continue until I ran mdadm --run /dev/X. At this time, there were two disks missing in the array, i.e. it it was U_U_.
I run with "bootdegraded" in the kernel options but this made no difference.
Thanks, Marc -- GigaTux Customer Service i...@gigatux.com www.gigatux.com -- To UNSUBSCRIBE, email to debian-bugs-dist-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org