Method and device for reconstructing independent redundancy array of inexpensive disks

Abstract

The embodiment of the invention provides a method and device for reconstructing an independent redundancy array of inexpensive disks. The method includes the steps of copying data on the fault disk in the independent RAID to the standby disk in the RAID, and enabling degradation data to be written into the standby disk, wherein the degradation data comprise data required to be written into the fault disk after the RAID is degraded. The data obtaining speed can be effectively quickened, the data reconstruction efficiency is improved, whole-disk data reading on the other member disks except for the fault disk is avoided in the data reconstructing process, the I/O pressure on the other member disks can be reduced, influences on normal business I/O are reduced, and then the spending of an RAID group system is reduced.

Description

technical field [0001] Embodiments of the present invention relate to communication technologies, and in particular to a method and device for reconfiguring an independent redundant disk array. Background technique [0002] With the rapid development of computer technology and network technology, the built-in memory of the computer is gradually difficult to meet many requirements such as fast access speed, large storage capacity and low cost, so a relatively independent storage system has been developed. The storage system is usually composed of storage devices such as storage servers, which have their own interfaces and protocols, and are connected to the computer host through coaxial cables, network cables, optical fibers, etc., and serve as a data storage center to provide storage services for the computer host. [0003] Redundant Array of Independent Disks (RAID) is a method of storing the same data in different places on multiple hard disks. figure 1 It is a schematic ...

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Problems solved by technology

[0004] However, with the development of storage technology, the capacity of a single disk is increasing, but the performance of a single disk is less improved, resulting in longer and longer reconstruction time. During the reconstruction, other member disks in the RAID group must continue to bear the normal Business input / output (Input / Output, referred to as I / O), but also to undertake additional reconstruction I / O, so that the pressure on the disk is high, resulting in a high disk failure rate

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