Sans Digital TowerRAID TR5M 5 Bay SATA to eSATA Port Multiplier JBOD/RAID 0, 1, 1+0, 5 Enclosure (Silver) Five 3.5-inch SATA hard disk drives to a single eSATA Port Multiplier interface. Accesses five hard drives using only one cable. Supports JBOD, Spanning, RAID 0, 1, 1+0, 5 with spare via software utilities. Cable-less backplane design supporting hot-swappable SATA I and SATA II. 2-port eSATA PCIe HBA included, to connect up to two units for a maximum of 10 HDDs. Support PC, MAC and Linux. (Please note that the host adapter card is based on Silicon Image chipset, which currently only support up to MAC OS 10.5.1 by Silicon Image.)