8/8/2023 0 Comments Disk geometry calculatorThe inner sectors with smaller physical area can have same capacity with the outer sectors through different density arrangement. ![]() The sector numbers on each track are the same in early hard disk. Each sector normally has a capacity of 512 bytes (Nowadays, the sector capacity can be 4K, called 4K sector). The track is divided into many short segments, which are called sectors. Surely, the track numbers on each side of each platter are the same. So, the cylinder value is the number of tracks on one side of each platter. So, the number of read-write heads is double that of platters.Īll the concentric tracks with same radius on all platters are vertically stacked into a cylinder. And two sides of the platter can all record data. The read-write heads read and write data along tracks on platters. The number of platters is related to the capacity of a hard drive.Įach platter is divided into tracks that are concentric circles. As we all know, each hard disk drive consists of platters and read-write heads. To know the cylinder-head-sector well, the basic structure of hard disk drive must be introduced. So, the disk geometry, namely the cylinder-head-sector value, and the corresponding CHS addressing are generated. What is cylinder-head-sector? Cylinder-head-sector, also known as CHS, is an early method for giving address to each physical block of data on a hard disk drive.Īt that time, the hard disk drive has small capacity and it is produced in a way similar to that of floppy disk.
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