Case:
The operating system Windows7, the file system is NTFS/FAT, and uses a 500GB speed of 7200r Hagizy hard disk. After power, the hard disk cannot be identified. The hard disk has a slight knocking sound.
Solution:
Remove the hard disk circuit disk from the hard disk, use a hot air gun to blow off the BIOS chip on the circuit board, use the programmer to read the data in the BIOS chip, analyze the type of SAP parameter of the hard diskUse the above method to read the SAP information after the above method is used to determine the magnetic head adaptability; use the spare parts with the consistent SPA parameter in the dust -free chamber to replace the head of the fault disk; after the magnetic head is replaced, connect the fault disk to the PC300 for UDMA to tryAfter power -on operation, the hard disk was ready after power -on, and it was able to access the hard disk firmware area, so I tried to perform a complete mirror of all sectors of the hard disk; the restored data was accepted.Data recovery 100%recovery successfully