Comment 9 for bug 315735

quequotion, what kind of RAID configuration do you have?

There is a workaround for the booting issue, if you have a RAID-5
go to /usr/share/initramfs-tools/hooks/
and edit the file called dmraid.

find the line that writes: force_load dm-raid45
and change it with this: force_load dm-raid4-5
and then update the initramfs and reboot

it seems that the module name has been changed in both the kernel 2.6.27 and 2.6.28