StarTech.com 3.5in 4 Drive eSATA USB FireWire External SATA RAID Enclosure Support for up to four 3.5in hard drives (HDD) provides this eSATA/USB RAID enclosure with large amounts of external storage with a choice of high speed interfaces from USB 2.0, FireWire400/800 or eSATA The removable front cover and accessible drive bays of this external storage solution allows hard drives (HDD) to be replaced easily in case of failure or upgraded External storage array with built-in support for numerous RAID modes for most personal/business needs USB to SATA enclosure with High Speed USB 2.0 host interface, with transfer rates up to 480Mbps 3.5" drive enclosure with SATA revision 2 compliant eSATA host interface with transfer rates up to 3.0Gbps 3.5in SATA enclosure with 1394a FireWire 400 and 1394b FireWire800 host interfaces with transfer rates up to 400Mbps and 800Mbps respectively Supported RAID modes: 0 (stripe), 1 (mirror), 3 (parity disk), 5 (striped parity), 10 (1+0), Span/Concatenation An 80mm controllable cooling fan keeps the 3.5 hard drives (HDD) from overheating Support for up to 4 drives provide large amounts of storage with a choice of high speed interfaces from USB 2.0, FireWire400/800 or eSATA The removable front cover and accessible drive bays allows drives to be replaced easily in case of failure or upgraded Built-in support for numerous RAID modes for most personal/business needs and an 80mm controllable cooling fan to keep drives from overheating High Speed USB 2.0 host interface, with transfer rates up to 480Mbps SATA revision 2 compliant eSATA host interface with transfer rates up to 3.0Gbps FireWire 400 and 800 host interfaces with transfer rates up to 400Mbps and 800Mbps respectively Supported RAID modes: 0 (stripe), 1 (mirror), 3 (parity disk), 5(stripped parity), 10 (1+0), Span/Concatenation User configurable directly from the unit itself