One of my friends recommended that I buy a 2nd hard drive like the one I have and put them in RAID 0. My question is: If one has a 16mb cache, and the other has a 32mb cache, can I still put them in RAID 0? My friend said he wasn't sure and I have absolutely no idea. Can't find another 16mb cache so that's why I'm asking. Same brand, same size, the only difference is the cache.