Case:
Customer Yi Xijie mobile hard disk, the customer backup a lot of important information, not used for a few months, and the computer was connected to the computer today and found that it was not recognizable.
Solution:
Customers get our center for data recovery. After disassembling the mobile hard disk box, it is the Seagate 500GB hard disk, the model ST9500424as.Use UDMA to detect the fault disk. The state has always been displayed as busy and unable to recognize. The power can hear the sound of the magnetic head.So using UDMA for debugging, no fruit, can only change the magnetic head. After using the spare parts to change the magnet, it can be recognized normally when you connect to UDMA again.