Under the same computer configuration, press the power switch of the computer, the computer equipped with SSD solid-state hard disk can appear on the desktop in more than 10 seconds, while the computer equipped with traditional hard disk takes more than 20 seconds. After entering the system, whether you are running a program or opening a file, you can clearly feel that the solid-state drive has an absolute advantage.
The principle of fast reading and writing of solid state hard disk;
In the process of reading and writing mechanical hard disk, the magnetic head needs to find the location of data storage on the disk with the precise cooperation of other mechanical components. In other words, the reading and writing process of mechanical hard disk depends on the operation of physical machinery.
The reading and writing process of SSD is to read and write the flash memory chip (the basic unit of NAND flash memory is shown below) under the command of the main controller through the transmission of electrical signals. Therefore, the reading and writing process of SSD depends on electrical signals. The running speed of electric signal is much faster than that of physical machinery, which is the essential reason for the fast reading and writing speed of solid-state hard disk.
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Advantages of SSD:
1, small size and light weight.
Compared with mechanical hard disk, solid state hard disk is smaller and lighter. However, this advantage gradually weakens with the increase of capacity. Up to 256GB, SSD is still lighter than ordinary mechanical hard disk with the same capacity. If it is an M.2 interface, the SSD is smaller, only the size of a U disk.
2, no noise mute
When the mechanical hard disk is started, the internal motor and fan rotate to generate noise. Solid-state hard disk has no motor and fan, just like USB flash drive. When the solid-state hard disk works, the noise decibel is basically zero, reaching a mute state.
3. Low calorific value
Solid-state hard disk has low power consumption and saves more electricity than mechanical hard disk. Low-capacity SSD based on flash memory has low energy consumption and low calorific value, but high-end or large-capacity products have high energy consumption.