My Book Studio II - 4 TB (2 x 2 TB) with SSD cache

Is it possible? Could I set up a  My Book Studio II - 4 TB (2 x 2 TB) with SSD cache? Also, is it possible to purchase multiple  My Book Studio II - 4 TB (2 x 2 TB) with SSD cache and create a different RAID setup? Say RAID 3, 4, or 5? Would I need to purchase a RAID controller to be able to do that?

What type of setup are you trying to acomplish?

Raid 0 or Raid 5 would probably my preferred setup. Could I combine 2 My Book Studio II - 4 TB (2 x 2 TB) externals to create a 8 TB RAID 0 setup? Could I stick a SSD cache in front of this RAID 0 setup?