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Host RAID management method and device based on solid state disk array

A technology of solid-state hard disk and management method, which is applied in the direction of electrical digital data processing, input/output process of data processing, instruments, etc., and can solve the problems of decreased disk life and increased write amplification.

Pending Publication Date: 2019-12-13
SHENZHEN YILIAN INFORMATION SYST CO LTD
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Problems solved by technology

This strategy greatly increases write amplification, resulting in a decrease in the life of the disk

Method used

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  • Host RAID management method and device based on solid state disk array
  • Host RAID management method and device based on solid state disk array
  • Host RAID management method and device based on solid state disk array

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Embodiment Construction

[0048] In order to make the purpose, technical solution and advantages of the present application clearer, the present application will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present application, and are not intended to limit the present application.

[0049] In traditional techniques, such as figure 1 Shown is the host mapping and access SSD model for a single SSD: specifically, the host accesses the SSD based on LBA, and the size of each LBA is typically 512B. The SSD will report the maximum LBA address supported by the host, and the access range of the host does not exceed the upper limit. An L2P table (logical address to physical address mapping table) is maintained inside the SSD, which represents the storage address of the logical data corresponding to the host on the physical NAND. SSD operates on NAND according...

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Abstract

The invention relates to a host RAID management method and device based on a solid state disk array, a computer device and a storage medium. The method comprises: acquiring a host RAID management request based on the solid state disk array; creating a virtual address mapping table from a host logic address to an SSD array according to the request; obtaining an access request initiated by a host end application program through the host logic address; querying or allocating virtual address information of a corresponding SSD array in the mapping table according to the host logic address; and initiating a read-write request to the corresponding SSD according to the virtual address information of the SSD array. By introducing the virtual address mapping table from the host logic address to theSSD array, the SSD array management module can sequentially allocate logic spaces of different SSDs to store write-in data of the host, so that the random write-in performance of the host is effectively improved, the write amplification is reduced, and the service life is prolonged.

Description

technical field [0001] The present invention relates to the technical field of solid-state hard disks, in particular to a host-side RAID management method, device, computer equipment and storage medium based on solid-state hard disk arrays. Background technique [0002] At present, SSD (Solid State Drive) has been widely used in various occasions. At present, in the PC market, it has gradually replaced the traditional HDD, providing users with a better experience in terms of reliability and performance. As the main storage medium of SSD, NAND has been constantly updated. With the evolution of the process, the reliability of the particles faces greater challenges. Within a given number of erasing and writing of NAND, as the PE (erasing and writing times) increases, the probability of error will also increase. In order to meet data accuracy requirements, in addition to traditionally increasing ECC error correction capabilities and using the built-in Read Retry command of NAN...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F3/06
CPCG06F3/0689G06F3/0616G06F3/0667G06F3/0638
Inventor 王猛徐伟华
Owner SHENZHEN YILIAN INFORMATION SYST CO LTD
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