Personal computers must have a hard drive installed before they can be used, because the computer's operating system is installed on the hard drive. If a computer does not have a hard disk, it means that there is no stored data, the system is gone, and it cannot be used.
If you want a faster computer, you basically choose to install a solid-state drive. After installing the solid-state drive, install the system into the solid-state drive. In this way, the computer The startup loading and extraction speed is ideal. The data we usually copy is directly related to our own computer hard drive. (Recommended learning: PHP Video Tutorial)
As a storage device, the hard disk has been playing an indispensable role since the birth of the computer. To a certain extent, the performance of the computer only affects the speed of computing data, while the task of the storage device is to ensure that all types of computing data survive.
The hard disk is the most important storage device of the computer. It stores all the user's data information. The value of these data is much higher than the hard disk itself. At the same time, the hard disk is the main component of the computer, and its performance is The quality directly affects the running speed of the computer and the user's operating experience.
Hard drives are divided into two types according to their different working modes: mechanical hard disk HDD (Hard Disk Drive) and solid state drive SSD (Solid State Drive). Mechanical hard disk is a traditional ordinary hard disk, which mainly consists of a platter, a platter shaft, a magnetic head assembly, a magnetic head drive mechanism, and a control circuit.
Solid state drive is similar to U disk technology, with an all-electronic structure and no mechanical moving parts. It uses integrated circuit storage technology and is composed of a control unit and a storage unit.
Most of the data generated by the computer is stored in the hard disk, so the hard disk has become an essential component of the computer. Computer hard drives have gone through many stages from their birth to the present, but in the end they have developed towards small size, fast speed, and large capacity.
Solid State Disk, referred to as solid disk or SSD, is a hard disk based on a solid-state electronic storage chip array and consists of a control unit and a storage unit.
Solid state drives are exactly the same as mechanical hard drives in terms of functions, specifications, and usage. Because they have a pure chip structure, solid state drives are much smaller in size and weight than mechanical hard drives.
Judging from the storage media used, it is mainly divided into two types. One is to use Flash chips as the storage medium and solid-state drives based on flash memory design: According to the difference in flash memory, it is divided into NAND flash memory and NOR flash memory.
NAND flash memory is widely used in the industry due to its advantages such as high storage density and fast rewriting speed. It is made into compact USB flash drives, laptop hard drives, memory cards for digital products, etc.
NAND solid-state drives are removable and data protection is not limited to power control, making them more suitable for individual users to use under various working conditions.
Another kind of solid disk uses DRAM as the storage medium. The application methods can be divided into two types: SSD hard disk and SSD hard disk array. Although it has a long service life and outstanding performance, the only drawback is that it requires an independent power supply to protect data security. Once the power is turned off, the data in the RAM will be lost and it is expensive. Therefore, the current application scope of DRAM solid-state drives is relatively narrow.
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