Method, device and system for hard disk data recovery

Abstract

The invention discloses a method, a device and a system for hard disk data recovery. The method comprises the following steps of: when detecting an error while reading data from a hard disk, recording a corresponding logical block address of the data with the error in the hard disk; executing data recovery operation on the data of a first physical block address corresponding to the logical block address according to a preset algorithm, and obtaining the recovered data; transmitting an instruction of writing the recovered data in the logical block address to the hard disk, so as to make the hard disk write the recovered data in the logical block address according to the instruction, wherein the logical block address corresponds to a remapped second physical block address. The invention further discloses a device and a system for hard disk data recovery. The invention aims at providing the method, the device and the system for hard disk data recovery, and the recovered data obtained through the preset algorithm are written in a sector corresponding to the remapped new physical block address, so that the sector with an error or the damaged block of the hard disk can be repaired quickly, and the repair efficiency of the sector with an error or the damaged block is improved.

Description

technical field [0001] The invention relates to the field of computer technology, in particular to a hard disk data recovery method, device and system. Background technique [0002] At present, commonly used hard disks include mechanical hard disks and solid-state hard disks. Because mechanical hard disks are easily affected by temperature and vibration, read and write errors occur, and the inherent erasure and write times limit and bad block rate of solid-state hard disks can also cause read and write errors. Although the hard disk has error correction capability, it can only correct erroneous data with a small number of error bits through its own error correction algorithm, and its error correction capability is limited. [0003] In the prior art, when there are too many error bits in the error data and the hard disk cannot correct the error through its own error correction algorithm, the storage controller usually uses the RAID (Redundant Array of Independent Disks, redun...

AI Technical Summary

Problems solved by technology

If other hard disks in the hard disk array have errors during the reconstruction operation, the data in the hard disk will not be recovered; and the formatting operation requires data reading, formatting and two data writing operations of the entire track. In order to write the data of the entire track (including the recovery data obtained by the RAID algorithm and other data on the track where the error data is located) to the reserved area, the second time is to write the data of the entire track to the track after the formatting is completed. It is cumbersome and time-consuming, and the reserved area is used to save the parameters and configuration information of the hard disk, which will bring greater risks when the first data writing operation is performed

Images