Booting RHES4-U2 from mirrored disk

[Ramer Ortega]

I'm trying to install RHES4-U2 in a mirrored SATA disks.  I have 2 disks 
and during the installation, I defined all the partitions as Software 
RAID and eventually created RAID1 for each partition, including the 
/boot partition.

Install went smoothly but after the completion and during reboot, the 
screen simply displays "GRUB".

I booted from the install CD and entered the rescue mode to check the 
partitions and the grub.conf.  The contents of /etc/fstab rightfully 
shows that all my partitions are mapped to the corresponding /dev/md? 
devices.

My question is, is there any limitation on grub to boot from a mirrored 
/boot partition?

Is there any other area that I should be looking at?

TIA