Hard disk classification

As we all know, hard drives are divided into mechanical hard disk (HDD) and solid state hard disk (SSD). Among them, HDD is a traditional ordinary hard disk. HDD has always been the mainstream hard disk in the market. Because of its long service life and low price, it has a broad market in the industrial control field and the personal consumer market.
From the main composition point of view, HDD mainly consists of disk, head, disk shaft and control motor, head controller, data converter, interface and cache. However, it is worth noting that the technology of all components of the HDD is in the hands of Japanese companies, and even the chips are monopolized by them. For American manufacturers, it is very difficult to get a share in this market, and at the same time, they cannot guarantee their information security.