A Bad Sector Mapping Method Based on Mechanical Hard Disk

Abstract

The invention discloses a bad sector mapping method based on a mechanical hard disk, which comprises the following steps: after the system is started, the bad sector management module starts to initialize; Area management module, after the bad sector management module converts it into a physical address, it detects whether it hits the bad sector mapping table and predicts the bad sector mapping table; then the bad sector management module decides whether to map the mapped physical The address or the real physical address is returned to the system; the system reads and writes the hard disk according to the physical address returned by the bad sector management module. If the read and write succeeds, the IO ends; Bad sector mapping operations for predictive properties. The invention can effectively avoid the problems of frequent IO error reporting and logically continuous but discrete physical sectors in the system caused by continuous sector damage, and can greatly improve the stability and performance of the system.

Description

technical field [0001] The invention relates to a bad sector mapping method based on a mechanical hard disk, and belongs to the technical field of data storage. Background technique [0002] Please refer to the attached figure 1 As shown, mechanical hard disks are disk-type, consisting of a group of overlapping disks, each disk surface is divided into equal number of tracks (Track), and numbered from "0" on the outer edge, with the same The numbered tracks form a cylinder, which is called a cylinder, and each track is divided into several arc segments, and these arc segments are sectors. Data is stored in sectors, and sectors that cannot write data are called bad sectors. [0003] In the life cycle of the mechanical hard disk, there are always "system IO errors caused by sector damage". Therefore, in a storage server with a mechanical hard disk as the main storage medium, IO errors reported due to hard disk sector damage are the main reason for system read and write failu...

AI Technical Summary

Problems solved by technology

[0006] In view of the above-mentioned problems and demands in the prior art, the purpose of the present invention is to provide a bad sector mapping method based on a mechanical hard disk to solve the problem of frequent IO errors in the system due to sector damage and the logically continuous but The actual physical sector is discrete, so as to improve the system IO read and write performance, improve system reliability and stability, and prolong the service life of the mechanical hard disk

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