Reconfiguration method and device of independent redundant disk array

Abstract

A reconstruction method and device for a redundant array of independent disks. The method comprises: copying data in a fault disk into a redundant array of independent disks (RAID) to a standby disk in the RAID; and writing degraded data into the standby disk, the degraded data comprising data which needs to be written into the fault disk after the RAID is degraded. The data acquisition rate can be effectively improved, thereby improving the data reconstruction efficiency. In the process of data reconstruction, avoiding reading all the data of other member disks except the fault disk can reduce the I / O pressure of other member disks, so that the influence on normal I / O service is reduced, and thus the overhead of a 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, RedundantArrayofIndependentDisks) is a method of storing the same data in different places on multiple hard d...

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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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