Hey everyone I am planning to start playing with raid. I understand that I am supposed to use identical drives. Lets say that I setup a raid 5 array with 4x 1TB SAMSUNG Spinpoint F3 7200rpm 32mb cache 512 byte sector. Lets say everything works great for a year then one of the drives dies leaving the array still functional but needing to have a replacement drive attached. Lets also say that the above samsung drives aren't available anymore, what do I do at this point? more specifically, would it be ok if I were to use a drive like a WD 1TB 7200rpm drive with lets say 64mb cache and 4k sectors? like exactly how similar should the drives be in a raid array?