What is the best software to use to detect hard disk bad sectors?

DiskGenius. The master boot sector records information about the hard disk itself and the size and location information of each partition of the hard disk. If it is rebuilt, the basic data structure information on the hard disk will be deleted and the reconstructed data structure information will be deleted.

It is possible to re-access the original data after reconstruction. The information in the master boot sector can be written by any partitioning software based on a certain operating system.

The first physical sector of hard disk bad sectors:

Historical background of hard disk bad sectors:

Due to historical reasons, the size of a sector of hard disk is 512 words section, containing up to 446 bytes of startup code, 4 hard disk partition table entries (16 bytes each, maximum 64 bytes), and 2 signature bytes (0x55, 0xAA). The master boot record consists of three parts: the boot program occupies the first 446 bytes (offset 0~1BDH).

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