A method, device and solid-state hard disk for avoiding data duplication recovery

Abstract

The present invention provides a method, device and solid-state hard disk for avoiding repeated recovery of data. The method includes: updating in real time the mapping relationship cache table stored in the cache chip, recording the updated data position of the data block; updating and storing in the flash memory according to the mapping relationship cache table The mapping relationship table in the chip flashes the updated data position of the data block to the flash memory chip; when the host is powered on again, according to the mapping relationship table and the last updated data position in the data block written by the host, the last update in the data block written by the host is recycled. Once the data location is updated, the mapping relationship table stored in the cache chip is rebuilt. This application updates the mapping relationship cache table in real time after the write operation, so as to prevent the data update cycle from being updated after the target block is full, and the data update cycle is prolonged. In addition, the application can record the updated data position of the data block, and can be reconstructed When mapping the relational cache table, the sequence of writing data is determined, so as to ensure the accuracy of reconstruction of the mapping relational cache table.

Description

technical field [0001] The present disclosure relates to the technical field of solid-state hard disks, and in particular to a method and device for avoiding repeated recovery of data, and solid-state hard disks. Background technique [0002] SSDs (Solid State Drives, solid state drives) have been widely used in high-performance storage systems because of their low read and write latency and high bandwidth. Please refer to figure 1 , which is a schematic structural diagram of a common solid-state hard drive. Depend on figure 1 It can be seen that the control part of the solid-state hard disk 500 is the control chip 200, and the CPU 201 inside the control chip 200 is responsible for the overall scheduling control of each hardware module in the SSD and the communication with the host 100; the storage space of the solid-state hard disk 500 includes the cache chip 300 (such as DRAM ) and a flash memory chip 400 (such as Nand flash). Among them, the cache chip 300 belongs to d...

AI Technical Summary

Problems solved by technology

[0005] Embodiments of the present invention provide a method, device, and solid-state hard disk for avoiding repeated recovery of data, so as to solve the problem that in the prior art, when the host computer loses power when the target block is not fully written, the target block that has been written needs to be data recovery issues

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