1U rack mount five (5) bay hardware 0/1/3/5/SPAN/CLONE and JBOD feature driver-less, usb3.0 | eSATA host 5x SATA drive as raid levels: 0/1/3/5/10/BIG/CLONE and JBOD feature hot spare; driver=less; eSATA host Very fast: RAID five over 240MB/sec Read or Write (tested with 3TB HDD SATA III) Support eSATA host with or without Port Multiplier ware - Built-in high performance RAID storage processor, PROM and SRAM for RAID engine Raid GUI or/and LCD display for easy control and manage with Email Notification of system, raid, devices status New design with 90-230VAC featuring PFC and 80+ power supply - Made in USA