The difference between Mechanical hard disk (HDD) and Solid-state drives

Mechanical hard disk (HDD) is a traditional ordinary hard disk, which mainly consists of: platter, magnetic head, platter shaft and control motor, magnetic head controller, data converter, interface, cache and other parts. Solid State Drives are hard drives made of solid-state electronic memory chip arrays.

The reading speed limit of a mechanical hard disk cannot exceed 200M per second, and the writing speed is difficult to exceed 100M per second. The solid-state hard disk has a great advantage in transmission speed, up to 500M per second, of which the reading speed reaches 400- 600M per second, and the writing speed can also be as high as 200M per second. It only takes a few seconds to process a 1G file, so for users who are pursuing speed and need to read or process large files, it is better to choose a solid-state drive.

Solid-state drives have a great advantage in speed, but due to higher costs, the current price of solid-state drives is generally 2-3 times that of mechanical hard drives. However, with the continuous development of Moore's Law, the density of solid-state drive NAND flash memory chips will become increasingly high. If the size is larger, the storage capacity will become higher and higher, and the price will become lower and lower in the future. It is foreseeable that it is imperative to replace the traditional mechanical hard drive with a solid-state hard drive. Moreover, solid-state drives have advantages in size and quality, and have better shock resistance, making them more portable for users who often take computers on business trips.