Samsung SP0802N does not recognize the disk data recovery case

Case:
After the customer is turned on normally, the hard disk does not recognize the hard disk.

Solution:
The old Samsung SP0802N all has a common problem, that is, there will be a slight knocking sound at this time after the power is working, and then the motor is stopped. In our case, this kind of problem accounts for half.After the test and found that the fault is the same as speculative, enter the 3K directly, keep knocking, the magnetic head is busy, and then the motor stops. At this time, unreasonable, directly enter the Samsung module. After clicking the “Soft Reset”” soft retirementThen