Can not recover 4 bay firewire 800 drobo

I Can Not Recover Data On My 4 Bay Firewire 800 Drobo! Need Help! It said my data is corrupt! I tried Disk Warrior, Tech Tool Pro and Data Rescue.

hi rex is it possible to know a bit more about the lights and drives on your drobo, and if dashboard is saying anything in particular?

also would you be abe to try a usb cable just to see if it helps at all?