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

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.