Seagate 750GB partition directory corruption

Case:
After the customer reinstalled the system, he found that the original partition error was lost, and some data were lost.

Solution:
Find the data recovery center through online inquiry. After the telephone consultation, I went to our company. After passing the talked of the hard disk information, I found that the customer partition directory system was rewritten by garbled, so the data was lost.The project uses manual computing to correct the data information of the system, and finally recovers.