AD5SARPM-E eSATA Port Multiplier for Rackmount Systems enables SATA hard drives to be configured for a wide range of storage applications. Build to fit perfectly into the Addonics Storage Tower and many standard 2 bay or larger SCSI enclosures, this Port Multiplier can combine up to 5 SATA hard drives into one eSATA connection. The 5 drives can be set up as individual drives, as RAID set or with JBOD to become one large hard drive depending on the controller. For more details on product, Please refer to http://www.addonics.com/products/ad5sarpm-e.php