Case:
When the customer was used normally, it was unable to find the D E logic area and crashed when reinstalling the system.
Solution:
Receive 3K, power up, the magnetic head reset is normal, you can identify the hard disk normally. After entering DE, you cannot find the partition table.The results of the preliminary analysis should be caused by a bad sector.DE is made of mirrors. The first 20G mirror often encounters bad sectors and difficult to read sector. There is no regular distribution of bad sectors. Even so, it can barely do it.When continuing to make the mirror, the motor suddenly did not increase the motor. It is suspected that there may be a problem with the circuit board. The power supply 12V and 5V of the circuit board were used to test the circuit board. It was found that the motor IC had no output. It was initially set as a circuit board problem.Later communication with the peers all said that such problems have been encountered in the end. Because there are many disk faults in the 11th generation and 12th generations, it is also likely that the insufficient power supply of the circuit board has caused abnormal motor speed or the magnetic group power supply is abnormal.”The bad sector