Designed to the latest 3Gbits/sec ASIC from Silicon Image and eSATA connector, this 4-port controller incorporates many advanced features that are only found in some expensive RAID controllers. With the onboard RAID firmware, the 4 eSATA ports can be easily configured as 4 individual ports with no RAID or with RAID 5, RAID 0, RAID 1, RAID 10, RAID 1+S, or JBOD (a feature of combining all 4 drives into one large capacity hard drive).When installed into the fast PCI-X BUS, this controller ensures maximum data throughput of 3 Gbits/sec per port. In addition, the latest External SATA (eSATA) connector also provides more secured cable connection, improved durability, increased EMI protection and up to 2 meters cable length.Throughput up to 200 Mbytes/sec sustained data transfer can be achieved using standard 7, 000 RPM SATA hard drive by setting up 4 drives in a RAID 0 configuration. Together with the Addonics optional Disk Array 4SA system, Saturn Hard Drive kit or the external SATA drive enclosure, you can add external high performance storage system that rivals the traditional SCSI storage at less than half of the cost.