Disk data pre-migration method of RAID (Redundant Array of Independent Disks) group

Abstract

The invention discloses a disk data pre-migration method of an RAID (Redundant Array of Independent Disks) group, and relates to the technical field of data storage. The method comprises the following steps of: 1, monitoring disk error information of the RAID group, wherein the disk error information comprises software detecting information and SMART alarming information; 2, if the number of the monitored disk error information achieves a preset threshold, migrating the data of a source disk having the disk error information to a target disk, wherein the data of the source disk having the disk error information comprises the data existed on the source disk, the data to be written into the source disk and the data to be written into the target disk; and 3, using the target disk to replace the source disk. According to the invention, a disk early warning technology is used for predicting that a failure of the disk may occur; the data is migrated to a spare disk in advance before the failure occurs; and when the RAID group breaks down, the possibility of losing data is preferably reduced by adopting the method provided by the invention than by the traditional method of restoring data when the disk is failed.

Description

technical field [0001] The invention relates to the technical field of data storage, in particular to a method for pre-migrating disk data of a RAID group. Background technique [0002] RAID is the abbreviation of Redundant Array of Independent Disks in English, translated into Chinese means "redundant array of independent disks", sometimes referred to as disk array (Disk Array). [0003] Simply put, RAID is a technology that combines multiple independent hard disks (physical hard disks) in different ways to form a hard disk group (logical hard disk), thereby providing higher storage performance and data backup than a single hard disk. The different ways to form a disk array are called RAID levels (RAID Levels). The function of data backup is that once the user data is damaged, the damaged data can be recovered by using the backup information, thereby ensuring the security of the user data. From the user's point of view, the composed disk group is like a hard disk, and the...

AI Technical Summary

Problems solved by technology

This processing mechanism lacks predictability and passively waits for disk errors before remediating the errors that occur

At the same time, for a disk array with a huge amount of data, using other disk data in the array to restore data requires a lot of calculations. This restoration operation consumes a lot of data bus resources and CPU resources, which also means that the time required for data restoration Long, and reduce the I / O capability of the RAID group itself, increase the I / O operation delay and reduce the I / O throughput rate

[0015] Another way to replace the disk is to stop the I / O operation of the RAID group first. This replacement method cannot be transparent to the user.

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