What Emerald has said is correct. As the drives are in RAID 0 you are dependent on the RAID Controller to access the drives. RAID 1 drives can be accessed as single drives. If your old and current controllers are both Intel for instance you might get away with it despite the disparity in system age. You can tell by plugging in the drives and seeing if they are recognised by the RAID BIOS at boot up. If they are all is good. If not then the moment you add them to an array you will lose the data. You would have so search out an identical controller to keep the data.