Solid state disk wear balancing method and device and computer readable storage medium

Abstract

The invention discloses a solid state disk wear balancing method and device and a computer readable storage medium. The method comprises the following steps of: constructing a plurality of free blocklinked lists and dirty block linked lists of which priorities are distinguished according to erasure times of data blocks, and classifying the data blocks into corresponding lists according to the erasure times, block types and erasure time allowable ranges; if the free block chain table meeting the wear leveling condition exists, setting a reset label for the block corresponding to the data blockwith the lowest erasure frequency; if the block reset instruction of the host is not received within the specified time, taking the data block with the lowest erasure frequency in each dirty block linked list as a source data block, and taking the data block with the highest erasure frequency in each idle block linked list as a target data block to carry out data migration; and when a request forapplying for the data block is received, selecting the data block from the idle block linked list with the lowest erasure frequency. The abrasion balance of the solid state disk based on the ZNS protocol is realized, the abrasion balance of each data block in the solid state disk is favorably ensured, and the service life of the solid state disk is effectively prolonged.

Description

technical field [0001] The present application relates to the technical field of wear leveling, in particular to a solid state disk wear leveling method, device and computer-readable storage medium. Background technique [0002] With the rapid development of cloud computing and Internet technology, massive data needs to be stored all the time in daily work and life, and data storage technology has been developed accordingly to meet the actual storage needs of explosive growth data. SSD (Solid State Drives, solid state drive) is a hard disk made of solid state electronic memory chip array, which consists of a control unit and a solid state storage unit. Due to its stable performance, such as fast read and write speed and low energy consumption, it effectively overcomes many shortcomings of mechanical hard disks and is widely used. [0003] The storage unit of the solid state disk includes multiple data blocks (Block), and the data block is the minimum erasing unit of the sol...

AI Technical Summary

Problems solved by technology

[0005] In related technologies, in the process of achieving wear leveling based on the ZNS protocol, when zoneopen (opening a block) applies for a new physical block, it may not necessarily provide it with a physical block with a lower number of erasures, resulting in uneven wear of each data block

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