Case:
The client’s computer was turned off during use, and the hard disk was not recognized after turning on the next day.
Solution:
The hard disk is a 3.5 -inch desktop hard disk of Hitachi, with a capacity of 320GB. It is found that the disk cannot be reset after power -on during power detection, and a regular knock on the disk. Viewing the tag can be determined that the hard disk is used for almost 5 years, so the preliminary judgment should be it should beMagnetic head aging or NV error (or IBM technology starting with IC, the probability of NV is relatively low).So use the same type of spare parts to replace the magnetic head, and the power can already be reset normally.At this point, the data is successfully recovered.