Drobo 2nd Gen. says "not formatted"

Drobo 2nd Gen. is connected via firewire to the macbook pro, all bay lights are green, dashboard says it is healthy, but it is not mounting and dashboard says
“not formatted”.

what does it mean? and how to fix this?

hi sanjay, i just saw your other post with more questions here:
(please wait for the moment and dont try do to any formating and i will post there more info for you too)