Solid state disk read-write method

Abstract

The invention discloses a solid state disk read-write method, which comprises four types of operation: reading data from a solid state disk; writing data in the solid state disk; writing caching data in a flash memory; and erasing invalid blocks from the solid state disk. The solid state disk read-write method is characterized in that: a block-level address mapping list with a cache is pre-established based on the cache; and the storage space of the solid state disk is pre-divided into a data block area, an invalid block area and a space block area; the data block area, the invalid block area and the space block area save respective erasing times and physical block address information in an array form; and the four types of operation of reading the data from a solid state disk, writing the data in the solid state disk, writing the caching data in the flash memory and erasing the invalid blocks from the solid state disk are executed in parallel. In the mode of adding the cache, the solid state disk read-write method effectively reduces the erasing frequency of the flash memory and improves the service life of the solid state disk. The four types of operation can be executed in parallel, which is favorable for improving the read-write speed of the solid state disk; and due to the adoption of the block-level address mapping mode, the occupied system storage resources are fewer.

Description

technical field [0001] The invention relates to a hard disk, in particular to a method for reading and writing a solid-state hard disk. Background technique [0002] Solid-state hard drives, also known as flash memory solid-state storage systems, have the advantages of fast data transmission speed, high reliability, low power consumption, shockproof and drop resistance, no working noise, low heat generation, and light weight. They are very suitable for personal users in the field of portable mobile storage and Government agencies, political and legal systems, banks, insurance companies and other storage areas that require high reliability. The relationship between the reading and writing method of the solid-state hard disk and the operations such as reading, writing and erasing is one of the determining factors for many important indicators such as the access speed, lifespan, and reliability of the storage system. South Korea's Samsung Corporation and Seoul National Univers...

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to make up for the defects in the prior art that the search algorithm is complex, the operation parallelism is poor, the address mapping table takes up a lot of system resources and is not practical, and to provide a practical and efficient method for reading and writing solid-state hard disks

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