Solid state disk device

Abstract

The invention provides a solid state disk. The solid state disk comprises an SSD controller, a first flash memory array and a second flash memory array which are connected through a bus, wherein the SSD controller comprises a first microprocessor, a second microprocessor, a cache controller, a host interface controller, a flash memory controller and an ECC module, and the storage density of the first flash memory array is smaller than that of the second flash memory array; the first microprocessor is set to be capable of writing data into the first flash memory array and reading the data of the first flash memory array and the second flash memory array, and during the period of writing or reading the data, a used channel is marked with write protection; and the second microprocessor is configured to read data of the first flash memory array and write data to the second flash memory array, and during writing or reading of the data, write protection is marked on a used channel. The solidstate disk can prolong the service life of the solid state disk, and meanwhile can improve the capacity of the solid state disk through the low-cost flash memory array with the high storage density.

Description

technical field [0001] The present invention relates to the technical field of computers, in particular to a solid-state hard disk device. Background technique [0002] Solid State Disk (SSD) is gradually replacing mechanical hard disks and becoming a mainstream storage device due to its high-speed read and write performance and low failure rate. SSDs store data through NAND flash particles. With the development of technology, NAND flash particles have changed from single-level cells (Single-Level Cell, SLC), multi-layer cell MLC (Multi-Level Cell), triple-level cells (Trinary-Level Cell) , TLC) evolved to 3D NAND, the storage density is getting higher and higher, and the storage cost per unit GB is decreasing. At the same time, the stability of stored data is getting lower and lower. Early solid-state drives can withstand more than 100,000 times of erasing and writing, while the current 3D NAND particles can only withstand hundreds of times of erasing and writing. For scen...

AI Technical Summary

Problems solved by technology

Early solid-state drives can withstand more than 100,000 times of erasing and writing, while the current 3D NAND particles can only withstand hundreds of times of erasing and writing. For scenarios with frequent data erasing, such as the server field, the working life of this type of solid-state hard drive hard to accept

Images