Data processing method and device for disk array

Abstract

The invention provides data processing method and device for a disk array. The method comprises the following steps of: orderly reading each set of strip data in each non-fault disk into a first solid hard disk of which the preset storage capacity is at least two sets of strip data; while reading the strip data to the first solid hard disk, orderly reconstructing the read strip data in each set in the first solid hard disk, and writing the data acquired by reconstruction into a hot spare disk; and when the strip data in the first solid hard disk reaches a preset storage capacity, orderly reading the strip data in each set in each non-fault disk into the first solid hard disk to cover the reconstructed strip data in the first solid hard disk. By introducing multiple sets of strip data into the RAID5 disk array, when the disk array is in the degrading mode, the SSD hard disk is used as a cache for prefetching the data in the non-fault disk, thereby enhancing the reconstruction speed of the disk array and reducing the risk of second disk failure in the degrading mode.

Description

technical field [0001] The invention relates to computer storage technology, in particular to a data processing method and equipment of a disk array. Background technique [0002] Redundant Arrays of Inexpensive Disks (RAID for short) is a technology that combines multiple independent hard disks in different ways to form a single logical hard disk group, thereby providing higher storage performance than a single hard disk. For a RAID5 disk array, when a member hard disk in the RAID5 disk array fails, the damaged data on the failed disk can be recovered and reconstructed based on the data on the non-faulty disk. [0003] In the prior art, when a RAID5 disk array performs data reconstruction, the disk array controller usually uses the data in the non-faulty disks as a unit, and proceeds sequentially according to the "read-rebuild" operation sequence that is performed sequentially in a loop Reconstruction of data in a failed disk. The stripe referred to here is the smallest st...

AI Technical Summary

Problems solved by technology

However, the inventor found in the process of implementing the present invention that the data reconstruction method in the prior art makes the controller need a certain amount of time to wait for the next set of data after each set of strip data is reconstructed, that is, two adjacent strips The rebuilding operations are not performed consecutively, and there is a certain interval, which leads to a longer rebuilding time of the disk array, especially when there is a lot of data to be rebuilt, multiple intervals will seriously affect the disk array. overall rebuild speed

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