IDE RAID controller. Type of connector used is IDE with an IDE cable. Max speed is 133MB/s data transphere. Uses a standard HD.
Serial ATA controller (SATA) Type of connector SATA Port. Thin Cable. HD's are hot swapable. Max speed is 150MB/s data transphere. Requires a SATA HD.
Both are capable of setting up 2 or more HD's in a RAID config.