High-performance reliable solid-state disk realizing method

Abstract

The invention provides a high-performance reliable solid-state disk realizing method. The method includes: (1), dividing all flash memory chips in a solid-state disk into groups and forming an RAID (redundant array of independent disks) 4-level flash array in each group by N successive flash chips; (2), receiving and storing data through a cache; (3), judging whether the cache is filled up or not, if yes, entering the step (4), and if not, returning to the step (2); (4), extracting N-1 data blocks from the cache and computing check values of the N-1 data blocks; making up the N-1 data blocks and the check values into filled stripe data and writing back the flash array; returning to the step (2). The flash chips in the solid-state disk are used for establishing the RAID4-level physical array to assure data reliability. Faults at different levels including page level, block level, or even chip level can be processed. Besides, writing-in performance is improved by writing of filled stripes and sequence, and spatial and performance loss resulted from data errors can be reduced to the utmost.

Description

technical field [0001] The invention belongs to the technical field of solid state disk (Solid State Drive, SSD) data reliability, and in particular relates to a high-performance and high-reliability solid state disk realization method. Background technique [0002] With the development of computer technology and network communication technology, the degree of informatization is getting higher and higher, and people's performance requirements for data storage are also getting higher and higher. Solid State Drive (SSD), as an emerging storage device, is favored for its small size, light weight, anti-vibration, and high read / write performance. There are generally multiple channels (channels) inside the solid-state disk, and each channel is connected to a certain number of flash memory chips (flash chips). Each chip is composed of five levels: chip (chip), wafer (die), group (plane) A block (block) a page (page). A page is the smallest unit of reading and writing, and a block...

AI Technical Summary

Problems solved by technology

[0004] The object of the present invention is to provide a high-performance and highly reliable solid-state disk implementation method; the high-performance and high-reliability solid-state disk implementation method aims at the problems of poor reliability and random write performance of traditional solid-state disks, and constructs a RAID4 level inside the solid-state disk The physical array ensures data reliability, and improves write performance through full stripe writing and sequential writing, minimizing space loss and performance loss caused by data errors

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