Which unit of measurement is used to indicate the speed of the hard drive

Which unit of measurement is used to indicate the speed of the hard drive? I believe that many inexperienced people are at a loss about this, so this article summarizes the causes and solutions of the problem. Through this article, I hope you can solve this problem.

The unit of measurement used to represent hard drive speed is rotational speed (revolutions per minute).

Introduction to related knowledge points:

Hard disk drive:

Hard disk drive (Hard-Disk Drive) is a major computer storage medium, which consists of one or more aluminum or glass discs.

These discs are covered with ferromagnetic material. The vast majority of hard drives are fixed and permanently sealed in the hard drive. Nowadays, removable hard drives are becoming more and more popular and there are more and more kinds.

Composition:

The mechanical hard disk is mainly composed of magnetic head and disk, and the magnetic head is the key part of reading and writing data of the mechanical hard disk. When the mechanical hard disk is working, the head will write track data or read existing data as the disk rotates.

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