L2P table dirty bit marking method and device based on solid state disk

Abstract

The invention relates to an L2P table dirty bit marking method and device based on a solid state disk, a computer device and a storage medium. The method comprises: acquiring an L2P table dirty bit marking request based on the solid state disk; expanding a corresponding dirty bit in an L2P table into two bits according to the request; when a first write command request is obtained, setting the dirty bit from a binary number 00 to a binary number 01 through a state machine; when the flush operation is started, setting the dirty bit from a binary number 01 to a binary number 10 through a state machine; and if a second write command request is obtained in the flare operation process, setting the dirty bit from a binary number 10 to a binary number 11 through a state machine. According to themethod, the 2-bit dirty bits are adopted, four different states are represented through the 2-bit dirty bits respectively, and a state machine skip mechanism is adopted, so that a write command does not need to be blocked in the flash programming period, the write performance is improved, and the write delay is reduced.

Description

technical field [0001] The present invention relates to the technical field of solid-state hard drives, in particular to a method, device, computer equipment and storage medium for marking dirty bits in an L2P table based on solid-state hard drives. Background technique [0002] At present, SSD (Solid State Drive) has been widely used in various occasions, and is gradually replacing traditional hard disks due to its excellent performance, power consumption, and environmental adaptability. [0003] In the traditional SSD-based L2P table management technology, the dirty bit is 1 bit. When the 1 bit dirty bit is used, after the L2P table flush starts and before the flush finishes dirty clearing, if the dirty bit is set to 1, the 1 state will be replaced by the following The dirty state is cleared to 0, so the dirty state will be lost. The traditional solution is to prevent the dirty bit from being set to 1 after the L2P table flush starts and before the flush finishes dirty. ...

AI Technical Summary

Problems solved by technology

The traditional solution is to prevent the dirty bit from being set to 1 after the L2P table flush starts and before the flush finishes dirty. Blocking, affecting write performance

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