CalDigit VR Mini - Bus Powered, Dual 2.5" HDD Hardware RAID - eSATA, USB 2, FireWire 800 and 400 (1TB) Quad Interface - USB 2.0, eSATA, Firewire 800 & 400 Hardware RAID - Supports RAID 0, 1, JBOD, and SPAN modes Removable Drives - Hot swappable drive modules for easy replacement LED Display - Change RAID settings without additional software Portable - Can be bus powered via FireWire