Most drives have a dipswitch no the back of the drive for selecting SATA/SATA2. If it doesn't have a switch then it doesn't need to be worried about and will work just fine with good ol regular SATA without any user setup.
have seen discussion where one group claimed a 7200rpm sata300 harddrive was fastest and another group saying the raptor was faster even if it only had sata150.
have seen discussion where one group claimed a 7200rpm sata300 harddrive was fastest and another group saying the raptor was faster even if it only had sata150.