Control method and control system for NAND flash memory data in solid state disk

Abstract

The invention provides a control method and control system for NAND flash memory data in a solid state disk. Storage space of the solid state disk comprises multiple flash memories, wherein one memory is taken as first storage space, and the rest flash memories are taken as second storage space. The invention is characterized in that the control method comprises the steps that whether to-be-written data is important data is judged, wherein the to-be-written data will be written to a corresponding position in the second storage space if the data is not the important data, and the to-be-written data will be written to a corresponding position in the first storage space and the to-be-written data will be written to the corresponding position in the second storage space if the data is the important data; and whether new to-be-written data exists is judged, wherein the step of judging whether the to-be-written data is the important data will be started if the new to-be-written data exists, and the step will be ended if the new to-be-written data does not exist. The technical scheme provided by the invention has the advantages that a bit error rate of NAND FLASH can be effectively reduced; and data reliability of the storage system can be effectively enhanced.

Description

technical field [0001] The invention relates to the field of storage technology, in particular to a control method and control system for NAND flash memory data in a solid-state hard disk. Background technique [0002] SSD (Solid State Disk) generally refers to a solid-state hard disk composed of NAND flash memory (Flash). Its special feature is that it has no mechanical structure and uses traditional NAND Flash characteristics to read and write functions in the form of block writing and erasing. , so the efficiency of reading and writing is very dependent on the design of reading and writing technology. Compared with the current traditional hard disk, SSD has the advantages of low power consumption, shock resistance, high stability, and low temperature resistance. Since the data on the SSD is stored on the semiconductor memory, it can complete the I / O (input / output) operation on the storage unit at any location in less than one millisecond, so it is the most critical I / O f...

AI Technical Summary

Problems solved by technology

[0005] The present invention aims to solve the technical problem of low reliability and performance caused by the high error rate of 3D NAND flash memory in the solid-state hard disk in the prior art, and provides a control method and control system for NAND flash memory data in the solid-state hard disk

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