Mirror image volume repairing method, device and system of storage system and readable storage medium

Abstract

The embodiment of the invention discloses a mirror image volume repairing method, device and system of a storage system and a computer readable storage medium, and the method comprises the steps: detecting the states of two volumes in a mirror image volume, and determining a normal volume and an abnormal volume when the state of one volume is abnormal; dividing the normal volume into N first areasaccording to a preset division mode, dividing the abnormal volume into N second areas, the first areas and the second areas are in one-to-one correspondence, and N is not smaller than 2; judging whether the data in each first area is consistent with the data in the corresponding second area or not, and if not, covering the data in the target second area by adopting the data in the target first area, wherein the first area and the corresponding second area which are inconsistent in data serve as a target first area and a target second area respectively. According to the method and the device,the data of the two volumes in the mirror image volume can be kept consistent in the use process, and the consistency, integrity and reliability of data backup are improved.

Description

technical field [0001] Embodiments of the present invention relate to the technical field of storage systems, and in particular, relate to a method, device, system, and computer-readable storage medium for repairing a mirrored volume of a storage system. Background technique [0002] In storage systems, mirroring is a common data backup method. The mirror volume is composed of two volumes (primary volume and secondary volume), and the two volumes are kept in real-time synchronization. When a write operation is performed, data will be written to the two volumes at the same time. However, due to reasons such as media errors, the data stored in the two volumes of the mirrored volume may differ, resulting in reduced consistency, integrity and reliability of data backup. [0003] In view of this, how to provide a method, device, system, and computer-readable storage medium for repairing mirrored volumes of a storage system that solve the above-mentioned technical problems has be...

AI Technical Summary

Problems solved by technology

However, due to media errors and other reasons, the data stored in the two volumes of the mirrored volume may differ, resulting in reduced consistency, integrity and reliability of data backup

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