The hard disk made of solid-state electronic memory chip array consists of a control unit and a memory unit (FLASH chip, DRAM chip). SSDs are exactly the same as ordinary hard disks in terms of interface specifications and definitions, functions and usage methods, and are completely consistent with ordinary hard disks in product shape and size. It is widely used in military, automotive, industrial control, video surveillance, network monitoring, network terminal, electric power, medical, aviation, navigation equipment and other fields.