Full Details on Amazon.com : http://www.amazon.com/gp/product/B003X0BJAE?tag=tsukuyomi-20
TowerRAID 4 Bay eSATA RAID 0/1/10/5/JBOD Performance Tower with 6G PCIe Card TR4MP (Silver)
Bundled with RR622 RAID controller card for over 200MBs RAID 5 performance
Dual-port eSATA 6Gbs PCIe 20 x1 RAID controller supports up to 2 units or 8 hard drives in a single or multiple RAID array
Backward compatible with PCIe 10
Supports RAID 0 1 10 5 5 spare spanning and JBOD
Supports online expansion to expand capacity without the need to recreate the RAID volume and erase the existing data
