The Drobo box remains attractive with the addition of this new model. There are small blue lights along the bottom to indicate percentage full, and the green lights to the one side indicate the drive status.
Here you can see that I have two Drobo devices attached. The first is my personal Drobo (Teradactyl), while the other is the review unit Drobo-FS. From this initial screen, you can see how much capacity your array has and how much space is available, as well as what shares are mounted.
From this screen, you can control whether or not the lights on the Drobo FS are dimmed, change the time until spindown of the drives, and even turn on or off dual disk redundancy (the ability of the array to survive not one, but TWO simultaneous drive failures).