Hard disk fault processing method, array controller and hard disk

Abstract

The embodiment of the invention provides a hard disk fault processing method. The method is performed by an array controller of a memory array. The storage array comprises a plurality of hard disks, each hard disk is divided into a plurality of storage blocks, and the storage blocks located in different hard disks form a storage block group through a redundancy algorithm. The method comprises thefollowing steps: acquiring fault information of a fault area in which a fault occurs in a first hard disk; when the fault information indicates that data loss exists in the fault area, determining a fault storage block where the lost data is located; recovering data of the fault storage block by utilizing other storage blocks in the storage block group to which the fault storage block belongs; storing the recovered data to a recovery storage block, the recovery storage block being located in a second hard disk, the second hard disk being a hard disk other than the hard disk where the storage block group is located; and recording a corresponding relationship between the address of the data in the fault storage block in the first hard disk and the address of the recovery data block in the second hard disk.

Description

technical field [0001] The invention relates to the field of storage technology, in particular to a processing method after a storage area in a hard disk fails, an array controller and a hard disk for executing the processing method. Background technique [0002] Since the solid-state hard disk cannot be written in situ, but can only be written in different places, a part of redundant space must be reserved in the solid-state hard disk as a space for data writing in the solid-state hard disk to improve the performance of the solid-state hard disk. The nominal capacity provided by the solid state drive does not include the capacity of the redundant space. [0003] When a fault occurs in a part of the solid-state hard drive (such as a die fault, hereinafter referred to as the fault area), in order not to reduce the nominal capacity, it is necessary to compensate the fault area through the capacity of the redundant space, which will lead to redundant The capacity of the free s...

AI Technical Summary

Problems solved by technology

The reduction of redundant space will lead to increased wear of SSDs, which will affect the performance of SSDs

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