Method for controlling data reading and writing of multi-channel solid-state disc

Abstract

The invention discloses a method for controlling data reading and writing of a multi-channel solid-state disc, comprising the steps of: (1) building a mapping table to store a mapping relationship of a solid-state disc logic address and a physical address, (2) transmitting a data to be written of a host terminal to a buffer area of a channel controller through a DMA (Direct Memory Access), (3) selecting a channel of which a channel state is ready, (4) finding out a reading request in a chip state which is ready from a reading request queue of the channel of which the state is ready and serving the reading request, (5) finding out a writing request in the chip state which is ready from a writing request queue if the reading request queue is null, writing the data of the buffer area into a free page of the chip, and then modifying corresponding relationship between a corresponding logic address and a physical address in the mapping table so as to finish writing operation. According to the method disclosed by the invention, fast transfer of an interface data is realized, and parallel communication among the channels and serial pipeline operation inside the channels are also realized. Abrasions among all the chips of SSD (solid state disks) are also uniform due to mode adoption of a token ring.

Description

technical field [0001] The invention relates to the technical field of solid state disk (SSD) control, in particular to a method for controlling data reading and writing of multi-channel solid state disks. Background technique [0002] SSD (Solid State Disk) refers to a solid state disk composed of NAND Flash. Compared with the current traditional hard disk, the solid-state disk has the advantages of fast read and write speed, low power consumption, shock resistance, high stability, and low temperature resistance. As the single-chip capacity of the Flash chip is getting larger and the price is getting lower and lower, the Flash-based solid-state disk has become a mainstream storage device. It is not only widely used in consumer electronics products, but also has a place in enterprise applications. The special feature of SSD is that it has no mechanical structure, and uses the characteristics of traditional NAND Flash to write by page and erase by block. The efficiency of i...

AI Technical Summary

Problems solved by technology

[0005] The technical problem solved by the present invention is to propose a method for controlling data writing / reading in view of problems such as low data writing / reading speed and unbalanced wear of multi-channel solid-state disks

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