PROMISE Pegasus R Series 4-bay and 6-bay are the First High Performance Hardware RAID Solutions featuring Thunderbolt technology. Thunderbolt technology is a new, high-speed, dual-protocol I/O technology designed for performance, simplicity, and flexibility. This high-speed I/O technology is capable of delivering a blistering two channels of 10 Gb/s (1.25GB/s) per port of performance. Capable of providing over 800 MB/s throughput and up to 12 TB capacity, Pegasus is ideal for small servers, creative pro workstations, power users and consumers, who desire quiet and sleek high capacity external storage with lightning fast performance and enterprise class data protection.