What is the size of each sector in a disk in bytes?

The size of each sector in the disk is generally 512 bytes. Sectors refer to areas divided on a disk. Each side of the disk is divided into many tracks, which are concentric circles on the surface. The closer to the center, the smaller the circle becomes, and each track is equally divided into units of 512 bytes.

Sector is the basic unit for disk storage data. The size of each sector is generally 512 bytes.

Related knowledge introduction:

Sector refers to the area divided on the disk. Each track on the disk is divided into several arc segments, and these arc segments are sectors of the disk. Sectors are the basic unit for hard disk reading and writing.

Each side of the disk is divided into many tracks, which are concentric circles on the surface. The closer to the center, the smaller the circles. Each track is divided into equal parts in units of 512 bytes, called sectors.

In the parameter list of some hard disks, you can see parameters describing the number of sectors for each track. It is usually identified by a range, such as 373~746, which means that the outermost track has 746 sectors, and the innermost track has 373 sectors, so it can be calculated that the capacity of the tracks is from 186.5KB to 373KB (190976B--381952B).

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