Method and system for internal cache management of solid state disk based on novel memory

Abstract

The invention provides a method and a system for internal cache management of a solid state disk based on a novel memory. The system for internal cache management of the solid state disk comprises an SATA (serial advanced technology attachment) interface controller, a microprocessor, a DRAM (dynamic random access memory), a local bus, a flash controller, an NAND flash and a PCRAM (phase change random access memory) cache. The PCRAM cache comprises a data block displacement area and a mapping table storage area, wherein the data block replacement area is used for storing data blocks displaced to the PCRAM cache from the DRAM, and the mapping table storage area is used for storing mapping tables among logic addresses and physical addresses of data pages. By the method for internal cache management of the SSD (solid state disk) based on the PCRAM, write cache for the solid state disk is realized to overcome read-write imbalance of the solid state disk, write performances are effectively improved, random write operation and wiping operation of the solid state disk are decreased, accordingly, the service life of the solid state disk is prolonged, and the integral I / O (input / output) performance of the solid state disk is improved.

Description

technical field [0001] The invention relates to the technical field of solid-state disk cache, in particular to a method and system for managing internal cache of a solid-state disk based on a new type of memory. Background technique [0002] With the widespread application of computer information technology, there are massive amounts of data that need to be processed and stored in human society. Therefore, the rapid development of information technology has put forward higher requirements on the performance of storage systems. At present, the capacity of computer storage systems has been greatly improved, but there is still a bottleneck in the data transmission rate of traditional disk storage. For this reason, solid-state hard disk technology came into being. Solid-state hard disk caters to the development trend of information storage. Compared with traditional disk systems, it has the advantages of faster unit read and write speed, lower energy consumption, and stronger m...

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Problems solved by technology

[0010] In view of the above-mentioned shortcoming of the prior art, the object of the present invention is to provide a kind of solid-state hard disk internal cache management method based on new memory, for solving the unbalanced reading and writing of the solid-state hard disk in the prior art, the erasing and writing of the FLASH flash memory chip Issues such as the limited number of times and the impact of random write operations on the life of the FLASH flash memory chip

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