If you want the best, Drobo is what you are looking for! They are expensive, but what is your data worth? I've had two, the four bay 1st generation Drobo, and the Drobo-fs gigabit networkable model. I've had one issue which was resolved by tech support in under 30 minutes from dialing to resolution. I have never lost any data and I have been using Data Robotics for the past 6 years!