ToughTech Duo QR (0 GB, no drives on this model) High-Performance RAID Storage System using dual 2.5" Notebook Drives... RAID1, RAID0 and Single Drive operation modes; Default RAID1 Mirroring to assure data integrity and protection on the road; Designed for optimal heat dissipation; Easy-release removable 2.5" drive sleds; Designed for Solid State (SSD) & standard SATA HDDs; Quad host interface: eSATA, FireWire 800/400 & USB 2.0; FireWire is daisy-chainable with bus power; BUS powered from FireWire 800 interface; New user-friendly display menu, input selection & drive health monitoring; Uses S.M.A.R.T. (Self-Monitoring, Analysis and Reporting Technology) to track hard drive health, diagnostics to detect data loss and prevent failure; User-selectable temperature warning and alarm settings (LEDs & Audible); DC power available for USB & eSATA operation; Drive sleds allow for drive insertion/removal without tools; Ability to set PIN for configuration control.