Method for processing writing request of redundant array of hybrid magnetic disc, controller and storage system thereof

Abstract

The embodiment of the invention relates to a method for processing a writing request of a redundant array of a hybrid magnetic disc, a controller and a storage system thereof. The method comprises the following steps: writing new written data into a temporary storage stripe corresponding to a target stripe, wherein the temporary storage stripe is positioned in a primary redundant array, and the target stripe is positioned in a secondary redundant array; acquiring verification information according to the new written data and data in the target stripe, writing the verification information into a verification stripping unit in the temporary storage stripe; and writing the data of the temporary storage stripe into the target stripe. The embodiment of the invention can avoid the problem of write holes occurring in data writing operation in the magnetic disc redundant array, improves the writing operation efficiency of the magnetic disc redundant array, and improves the secure performance of stored data of the magnetic disc redundant array.

Description

technical field [0001] The invention relates to storage technology, in particular to a write request processing method, controller and storage system of a hybrid disk redundant array. Background technique [0002] With the development of storage systems, existing storage systems can support Redundant Arrays of Inexpensive Disks (RAID for short), and RAID can be divided into RAID0, RAID1, RAID10, RAID3, RAID5, RAID6 and other levels , wherein, RAID5 is a storage technology that takes into account storage performance, data security and storage cost, and is widely used. When storing data, the data and its corresponding verification information are stored on each disk that constitutes RAID5, and the verification information and its corresponding data are interleavedly stored on different disks, which can effectively ensure the reliability of the stored data. [0003] figure 1 It is a schematic diagram of the data structure of a RAID5 stripe when a write hole problem occurs. S...

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Problems solved by technology

[0005] In the process of realizing the present invention, the inventor found that in the prior art, the new verification information is mirrored to the backup controller every time a write request is processed, so that the controllers are frequently mirrored. Due to the large amount of data of the mirrored verification information , frequent mirroring reduces the write operation efficiency of the entire storage system

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