Disk array fault tolerance apparatus with cloud server backup function

Abstract

The present invention discloses a disk array fault tolerance apparatus with a cloud server backup function. The apparatus comprises a replacement unit, a rebuilding unit, a recording unit, a processing unit, a repairing unit, and a recovering unit. The recording unit is connected with the rebuilding unit, the processing unit, the repairing unit, and the recovering unit. The recording unit is connected with a cloud server backup storage by using a connection device. The rebuilding unit is connected with the replacement unit. A rebuilding read error of a strip is repaired by using a write method, and the redundancy of the disk array is recovered as soon as possible, so that failure of the whole disk array due to faults of multiple disks in rebuilding is prevented. The apparatus has the cloud server backup function. When a local disk has an irreparable fault, backup data can be recovered from the storage of the cloud server.

Description

[0001] Technical field: [0002] The invention relates to the field of disk storage systems, in particular to a disk array fault-tolerant device with cloud server backup. [0003] Background technique: [0004] A redundant array of independent disks, referred to as a disk array, combines multiple independent disks into an array to provide good redundancy and higher storage performance than a single disk. In the field of storage, data is directly or indirectly stored on multiple individual disks through the redundancy of the disk array itself, so that data will not be lost when one or more disks fail, that is, data fault tolerance is realized. [0005] Wherein, when the redundancy of the disk array is lost due to some reasons such as failure of a disk in the disk array, the disk array will be in a degraded state. Taking a disk failure in a disk array to cause the disk array to lose its redundancy and make the disk array in a degraded state as an example, in the prior art, in or...

AI Technical Summary

Problems solved by technology

However, during the rebuilding process, if a disk rebuilding read error occurs again, where the rebuilding read error is a read error caused by rebuilding I / O during the rebuilding process, then the rebuilding is stopped. At this time, the disk array can only Stuck in degraded state cannot return to redundant state

Once other disks in the disk array fail again, the entire disk array will fail and close the I / O channel, which will not only cause the disk array to stop providing services, but also cause the data stored in the disk array to be lost

[0006] In addition, when a business read is performed on a disk array in a degraded state, if a business read error occurs, where the business read error is: a read error caused by business I / O on the disk during the business read and write process, then the disk array at this time Failure, that is, closing the I / O channel, which causes the disk array to stop providing services and causes the loss of previously stored data

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