i currently have WD 80gb 2mb cache drives in a RAID0 array, and id like to get some redundancy on them, as well as being able to become more experienced with RAID. however, its now more expensive to get 2mb cache drives than 8mb cache drives. theoretically, there shouldnt be any problem with have 2mb and 8mb drives in the same array, AFAIK. is this correct? would it be better to keep everything the same? am i over analyzing? thanks.