If you search long enough in these forums, it's a well-known fact that optical drives do NOT work properly in RAID mode. The only workable setting is IDE mode. That's just the limitations with the chipset function and drivers.
Why do you want optical drives in RAID mode? So you can have the impossibility of redundancy with optical drives? Again, SmartPack is meant to be used with optical drives, not hard drives or SSDs, so there is NO reason to support RAID.
Get a Silicon Image-based add-on card flashed to BASE BIOS, not RAID BIOS, if you want to use the LabelTag feature.