Sans Digital TowerRAID TR8M+B - 8 Bay eSATA RAID 0/1/10/5/JBOD Performance Tower with 6G PCIe Card (Black) Bundled with RR622 RAID controller card for over 250MB/s of RAID 5 performance. Supports RAID 0, 1, 10, 5, 5+ spare, spanning and JBOD. Backward compatible with PCIe 1.0. Supports online expansion to expand capacity without the need to recreate the RAID volume and erase the existing data. Built-in real time hard drive health monitoring and e-mail notification for critical events. Supports PC, Linux and MAC OS; including Windows 7 and Snow Leopard. Accesses eight hard drives using only two cables.