Update the BIOS and contact HP should you still not be able to get RAID 5.
Already got the latest 5.13 BIOS, ddn't help. Other searches have led me to believe it's an HP doesn't support this issue. Deliberatly taken out of the ROM? I'm just going to RAID0 x 3 x 500G and keep it hooked to the 1.5G FreeAgent for backup.
Thanks for the reply.