Solid state drives(SSDs) are made of solid state electronic memory chip arrays. They mainly consist of a control unit and a memory unit (FLASH chip, DRAM chip). Solid state drives have the following advantages: shockproof performance, low power consumption, wide operating temperature range, and portability. Solid state disks(SSDs) are widely used in vehicle, industrial control, video surveillance, network monitoring, network terminal, power, medical, aviation, navigation equipment and other fields. Mechanical hard disks consist mainly of a magnetic head and a disk.