At work I am getting a new 20TB raid box (thunderbolt, firewire, usb3) and will be migrating most of my data over to it, doing this is going to free up some drives from an aging NAS. Can I put 3 drives in software RAID 5 in the mac pro 2,1(internally). I've done software 2 drive RAID 0 and RAID 1 in a mac pro, just not RAID 5. I will not be using this for OS, the 4th bay is my OS drive. I tried googling this but couldn't find this specific situation of 3 internal drive soft raid 5.