Storage method and reading method of solid state disk mapping relation and solid state disk

Abstract

The invention provides a solid state disk mapping relation storage method, a solid state disk reading method and a solid state disk, and the storage method comprises the steps: storing a mapping relation of a write request into a first memory unit of the solid state disk as a first data segment; When the first memory unit is fully written, the first data segment is converted into a second data segment, and the second data segment is stored in the second memory unit; When the remaining capacity of the second memory unit is smaller than a first preset threshold value, the second data segment isconverted into a third data segment, and the third data segment is stored in a third memory unit; And when the remaining capacity of the third memory unit is smaller than a second preset threshold value, moving the third data segment into the solid state disk storage chip. According to the solid state disk mapping relation storage method, the solid state disk reading method and the solid state disk provided by the invention, the performance cost caused by the solid state disk reading-writing mapping relation is effectively reduced.

Description

technical field [0001] The present application relates to the technical field of solid-state hard disks, and in particular to a method for storing mapping relationships of solid-state hard disks, a method for reading them, and solid-state hard disks. Background technique [0002] Nandflash particles used in solid-state drives, due to their advantages in physical characteristics, greatly improve the efficiency of persistent storage, especially random read and write. However, the erasing life limit of Nandflash particles also leads to the solid state hard disk must dynamically record the mapping relationship between the user's read and write address (logical address) and the actual address (physical address) of the particle, in order to use every transistor on the particle as evenly as possible . For example, when a user repeatedly submits modifications to the same logical address, the SSD needs to record data to different transistors. [0003] In the prior art, by installin...

AI Technical Summary

Problems solved by technology

[0005] This application provides a storage method, a reading method, and a solid-state hard disk for the mapping relationship of a solid-state hard disk, so as to solve the problem of low processing efficiency of the solid-state hard disk mapping relationship

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