Case:
The client said that the new hard disk just replaced, all the data was directed to the new hard disk, and it was not recognized for a few days.
Solution:
Through the professional testing of the engineer, the cause of the fault is found. The hard disk firmware is damaged. This is currently a lot of failures in the hard disk of Seagate. It is a hard disk design defect. The firmware must be repaired to extract the data.The final data was successfully proposed.