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RAID array transposing method and device thereof

An array and array logic technology, applied in the field of data storage, can solve problems such as the inability to restore RAID1 arrays and affect online business performance, and achieve the effect of accelerating the conversion speed

Active Publication Date: 2009-10-14
NEW H3C TECH CO LTD
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  • Abstract
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Problems solved by technology

If there is data read and write to RAID1 during the array conversion process, both the primary disk and the mirror disk of RAID1 need to be read and written. ), read and write operations must wait for the data migration to complete, which will greatly affect the performance of online services, and if the data migration of the RAID array is terminated during the array conversion process, the original RAID1 array cannot be restored

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  • RAID array transposing method and device thereof
  • RAID array transposing method and device thereof
  • RAID array transposing method and device thereof

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Embodiment Construction

[0056] The core idea of ​​the present invention is: to convert a RAID1 array to a RAID5 array, data needs to be migrated to a RAID1 disk and a new disk. Use the mirror disk of the RAID1 array as the source data disk to provide the data source for array reconstruction, and the main disk of the RAID1 array as the service disk to provide online business read and write; maintain the data modification logical address table of the online business to record online in the main disk Business data modification or addition; during the data migration process, the data of the original RAID1 primary disk is not migrated, and the logical address of the RAID5 array corresponding to the RAID1 primary disk is reserved; after confirming that the data of the RAID1 mirror disk is migrated to the RAID5 array, correct The physical address of the RAID1 main disk is mapped to the reserved logical address of the RAID5 array, and the logical address of the RAID1 main disk is addressed according to the mappi...

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Abstract

The invention discloses an RAID transposing which comprises the following steps: an RAID controller sets an RAID 1 mirroring disk as a source data disk and an RAID 1 primary disk provides online service reading and writing; the RAID controller transfers the data of the RAID 1 mirroring disk to an RAID 5 as source data and does not transfer the data of the RAID 1 primary disk; an RAID 5 logical address corresponding to the RAID 1 primary disk is reserved; after the RAID controller confirms that the data of the RAID 1 mirroring disk is transferred to the RAID 5 array completely, mapping is conducted to a physical address of the RAID 1 primary disk and the reserved RAID 5 logical address; and logical address forming is conducted to the RAID 1 primary disk according to the mapping relationship, and array transposition is finished. Therefore, the method and the device do not affect the online service performance of an array and can speed up RAID transposition.

Description

Technical field [0001] The present invention relates to the technical field of data storage, in particular to a method and device for RAID array conversion. Background technique [0002] RAID (Redundant Array of Independent Disks), as a high-performance and highly reliable storage technology, has been widely used. RAID combines a series of individual disks in different ways to provide a logical disk for an application host or host cluster. RAID technology uses a combination of multiple disks to expand disk capacity and improve data read and write speed and security. For example, when one or more disks fail, it can calculate the lost data based on the data in other disks. [0003] After continuous development of RAID technology, there are now 6 clear standard levels of RAID from RAID 0 to RAID 5. In addition, there are RAID6, RAID7, RAID10 (combination of RAID 1 and RAID0), RAID01 (combination of RAID 0 and RAID 1), RAID30 (combination of RAID 3 and RAID0), RAID50 (combination of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G11B5/00G11B33/00G06F12/00
Inventor 郑萍萍
Owner NEW H3C TECH CO LTD
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