Address mapping method and system as well as solid-state disk

Abstract

The invention discloses an address mapping method and system as well as a solid-state disk. The method comprises the steps of determining the capacity of a mapping table in the solid-state disk; judging whether the capacity is greater than a preset capacity threshold or not; if the capacity is greater than the preset capacity threshold, setting an address mapping mechanism of the solid-state disk as a first address mapping mechanism; and if the capacity is smaller than or equal to the preset capacity threshold, setting the address mapping mechanism of the solid-state disk as a second address mapping mechanism, wherein the mapping table capacity required by the first address mapping mechanism is smaller than that of the second address mapping mechanism, and the mapping performance of the second address mapping mechanism is superior to that of the first address mapping mechanism. According to the method and system as well as the solid-state disk, the advantages of two different address mapping mechanisms can be combined, so that the solid-state disk can have relatively high mapping performance while the mapping table of the solid-state disk occupies relatively small space.

Description

technical field [0001] The invention relates to the technical field of solid-state hard drives, in particular to an address mapping method, system and solid-state hard drives. Background technique [0002] Currently, SSDs (Solid State Drives, solid state drives) need to use a certain address mapping mechanism to convert logical addresses from the file system into corresponding physical addresses. [0003] The commonly used address mapping mechanisms in solid state disks include page address mapping mechanisms, block address mapping mechanisms, and hybrid address mapping mechanisms. These three address mapping mechanisms have their own advantages and disadvantages. For example, the page address mapping mechanism has excellent mapping performance, but the required mapping table capacity is large; the block address mapping mechanism has poor mapping performance, but the required mapping The table capacity is much smaller; and the hybrid address mapping mechanism is an address ...

AI Technical Summary

Problems solved by technology

These three address mapping mechanisms have their own advantages and disadvantages. For example, the page address mapping mechanism has excellent mapping performance, but the required mapping table capacity is large; the block address mapping mechanism has poor mapping performance, but the required mapping The table capacity is much smaller; and the hybrid address mapping mechanism is an address mapping mechanism obtained by combining the page address mapping mechanism and the block address mapping mechanism, and its advantages and disadvantages are between the page address mapping mechanism and the block address mapping mechanism. between

[0004] Since the current solid-state hard disk either adopts the page address mapping mechanism, or adopts the block address mapping mechanism or the mixed address mapping mechanism, the existing solid-state hard disk either has poor mapping performance, or the mapping table needs to occupy a large space

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