ADAC 493 is a dual-channel PCI RAID (redundant array of independent disks) controller. Intel's i960RN CPU, PCI Hot Plug support, 64-bit PCI bus, dual Ultra 160 SCSI channels, and high performance drivers increase system throughput. These features help make the ADAC 493 one of the most powerful yet affordable RAID controllers available, while providing superior performance, data protection and fault tolerance