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smr-based raid creation, data writing for raid and raid recovery method

A data volume, to-be-written technology, applied in the input/output process of data processing, redundant data error detection in operations, electrical digital data processing, etc., can solve problems such as not supporting out-of-order writing

Active Publication Date: 2022-08-09
HANGZHOU HIKVISION DIGITAL TECH
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  • Claims
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AI Technical Summary

Problems solved by technology

[0003] However, considering that each writing area in the SMR (Shingled Magnetic Recording, Shingled Magnetic Recording Disk) area of ​​SMR only supports sequential writing, and does not support out-of-sequence writing, therefore, in the related art, when utilizing SMR When creating a RAID, an additional SSD (Solid State Disk, solid state drive) is required as a cache to achieve data storage

Method used

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  • smr-based raid creation, data writing for raid and raid recovery method

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Embodiment Construction

[0056] Below the attachment in the embodiments of the invention will be clearly and fully described in the technical solutions in the embodiments of the present invention. Obviously, the embodiment described is only a part of the embodiments of the invention, not all the embodiments. Based on the embodiments in the present invention, all other embodiments obtained from this application based on this application are the scope of the protection of the invention based on the application of this application.

[0057] Considering that each writing area in SMR's SMR region only supports the order of the order and does not support disorderly writing. Therefore, when using the RAID created by SMR, additional SSD is required to achieve data storage. Based on this, how to use SMR to create RAID without using other hard disks as a cache has become a technical problem that needs to be solved urgently.

[0058] To solve the above technical problems, the embodiment of the present invention prov...

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Abstract

Embodiments of the present invention provide a method for creating a RAID based on SMR, which relates to the technical field of data storage. The SMR-based RAID creation method is applied to a preset RAID drive, and the creation method includes: determining multiple SMRs for creating a RAID; configuring the SMR areas of the multiple SMRs as the first array of the target RAID to be created ; wherein, the first array includes a plurality of strips, and each strip includes a write area with the same offset address in the SMR area of ​​the plurality of SMRs, and is used to store the write in the way of aligning the order of writing. data file; configure the CMR areas of the multiple SMRs as the second array of the target RAID. Compared with the prior art, by applying the above-mentioned creation method provided by the embodiments of the present application, it is possible to create a RAID using SMR without using other hard disks as a cache.

Description

Technical field [0001] The invention involves the field of data storage technology, especially the SMR -based RAID creation, data writing on RAID, and RAID recovery methods. Background technique [0002] SMR (SHINGLED MAGNETIC Recording, stacked tile magnetic recording disk) increased its own magnetic tract density by overlapping magnetic tract, thereby increasing its own capacity. In order to make full use of the advantages of SMR, there is a need to use SMR to create RAID (Redundant Arrays of Independent Disks). [0003] However, considering SMR's SMR (SHINGLED MAGNETIC Recording) area in the region in the area in the area of ​​the area of ​​the area supports order only, not supporting the order of disorderly writing. When created, you need to use SSD (solid state disk) as a cache to achieve data storage with the help of SSD (solid state disk). [0004] Based on this, how to use SMR to create RAID without using other hard disks as a cache has become a technical problem that nee...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F3/06G06F11/14
CPCG06F3/0689G06F3/0644G06F3/0619G06F11/1448
Inventor 赵修伟
Owner HANGZHOU HIKVISION DIGITAL TECH
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