In such a scenario, you need to take the hard disk to a data recovery specialist who has a Class 100 clean room facility. We would recommend you to use Stellar Data Recovery Services.
Using data recovery services from Stellar has the following advantages:
100% Risk Free Recovery
State of Art Technology Labs (Class 100 clean room)
No Recovery, No Charge Policy
Fast Turnaround Time
Payment after Data Retrieval
Strict Adherence to Confidentiality Norms
Priority Service