MicroNet's DataDock II quad interface dual drive RAID is a high-speed, low-cost portable RAID storage solution. It is compact and easy to use - no software needed. DataDock II is perfect for audio/video editing, photo archiving or just storing office data. With two hot-swappable 3.5" SATA II removable hard drives, you'll have plenty of storage capacity.Whether you're a digital photographer, audio/video editor or creative professional the DataDock II is the ideal storage solution to protect your valuable files. Unlike single drive backup, DataDock II employing RAID 1 simultaneously writes your valuable data to two independent hard drives so you have immediate backup as you save. In the event of a drive failure, you still have your data available while you send in the removable failed drive for repair.The MicroNet DataDock II provides four interfaces including eSATA, FireWire 400, 800 and USB 2.0 with data transfer rates up to 300MB/s using eSATA. A durable aluminum enclosure with a low noise DC fan makes this little unit quiet and cool.Raid levels 0, 1, and spanning offer the flexibility to choose redundancy or performance depending on your particular need. RAID 1 offers 100% data redundancy and automatic data rebuilding in case of drive failure. RAID 0 provides maximum performance for tasks such as editing multiple streams of video with optimum playback.