When a computer hard drive fails, you can send it to a professional data recovery service. These companies place a corrupted drive into a clean room where they carefully crack it open, revealing the mirrored platter within.
These companies can perform miracles, sucking data off of even the most corrupt and obscured hard drives. Still, it is expensive. These services can charge between five hundred to ten times as much, and even more, depending on the complexity of the data and the speed in which they must retrieve it
Northern California-based DriveSavers offers a relatively inexpensive ($500) “Economy” service for simple hard drives.