This eSATA External RAID HDD Enclosure/Mobile Rack delivers a high performance external RAID solution that lets you install up to four SATA hard drives for connection to the host computer through eSATA. The 4 drive mobile rack automatically configures your RAID array based on your selection (Spanning, RAID 0, RAID 1, RAID 0+1 as well as JBOD arrays supported), delivering a simple yet flexible RAID storage solution. With support for up to four 2TB SATA hard drives (maximum combined capacity 8 Terabytes), the enclosure features individual removable drive trays that make hot swapping or interchanging failed or extra hard drives easy. An economical external storage solution, the enclosure supports any 3.5in SATA hard drive, allowing you to customize the storage appliance based on your preference of hard drive manufacturer. To ensure a safe and sturdy operating environment for installed hard drives, the enclosure features a built-in 80mm ball bearing fan that enhances hard drive cooling, and offers a high quality aluminum body and attractive front panel design. An out-of-the box external RAID solution, the storage appliance includes the companion PCI Express SATA controller card (with port multiplier support), as well as an eSATA cable and the necessary power adapter.