Comment 15 for bug 8497

This is still a problem in flight 7 (AMD64)

I have a slightly different configuration:

400G SATA (boot drive)
DVDROM (pri-master)
DVDRW (pri-slave)
Promise Card with 2 drives (pri-master, sec-master)
Promise Card with 2 drives (pri-master, sec-master)

my boot order is removable, optical, sata

The 4 PATA drives attached to the promise cards are in a RAID-5 configuration, but are used as storage--no booting involved.

Changing the grub files after the fact took care of the problem.