A method and device for realizing raid reconstruction

Abstract

The invention discloses a method and a device for achieving RAID reconstitution. The method comprises the following steps: identifying that a bad sector exists in a disk of a RAID group; locking sectors of other disks except the disk where the bad sector locates in the RAID group whose location is the same as that of the bad sector, and sectors of the fault disk which causes a RAID reconstitution; respectively obtaining a first data in the sectors of the locked other disks and a second data in the sectors of the locked fault disk; verifying the data in the bad sector based on the obtained first data and second data as well as the priority of the RAID group; storing the verified data into a preserved disk sector in the disk where the bad sector locates, verifying a proof test value based on the verified data and the obtained first data, and storing the proof test value into a sector of a backup disk, wherein the location of the sector of the backup disk is the same as that of the bad sector. The technical scheme increases the efficiency of RAID reconstitution.

Description

Technical field [0001] The present invention relates to disk storage technology, in particular to a method and device for realizing redundant array of disks (RAID) reconstruction. Background technique [0002] The storage system is the cornerstone of the entire IT system and the basic platform on which IT technology relies and exerts its effectiveness. The previous storage form was that the storage device (usually a disk) and other hardware of the application server were directly installed in the same chassis, and the storage device was exclusively used by the application server. [0003] Redundant Array of Inexpensive Disks (RAID, Redundant Array of Inexpensive Disks) technology combines individual disks to form a logical hard disk in different combinations, thereby improving disk read performance and data security. Among them, different combinations Use the RAID level to identify. After continuous development of RAID technology, it now has 6 standard RAID levels ranging from RA...

AI Technical Summary

Problems solved by technology

However, once there are also bad sectors in the remaining disks in the RAID group, it will be impossible to recover the data on the sector where the failed disk that caused the RAID reconstruction is the same as the bad sector in the remaining disks in the RAID group

Since hard disk failures are mostly caused by sector failures in a small number of blocks, the relative probability of disk reconstruction failure due to a small number of sector errors is relatively high, and errors in a small number of sectors cause the entire disk to be kicked out of the RAID member, resulting in RAID failure and the entire RAID All data on is lost and inaccessible

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