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Method, device and system for wear leveling of physical hard disk

A wear leveling and hard disk technology, applied in the storage field, can solve the problem of low accuracy of wear leveling results of solid-state disks, and achieve the effect of reducing data verification overhead, ensuring data reliability, and improving accuracy

Active Publication Date: 2020-06-02
XFUSION DIGITAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The embodiment of the present application provides a physical hard disk wear leveling method, device and system to solve the problem of low accuracy of solid state disk wear leveling results in the prior art

Method used

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  • Method, device and system for wear leveling of physical hard disk
  • Method, device and system for wear leveling of physical hard disk
  • Method, device and system for wear leveling of physical hard disk

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Embodiment Construction

[0079] The application will be described in further detail below in conjunction with the accompanying drawings.

[0080] Embodiments of the present application provide a physical hard disk wear leveling method, device and system to solve the problem of low accuracy of solid state disk wear leveling results in the prior art. Wherein, the method and the device are based on the same inventive concept, and since the principles of the method and the device to solve problems are similar, the implementation of the device and the method can be referred to each other, and the repetition will not be repeated.

[0081] see figure 2 As shown, it is a physical hard disk wear leveling system 20 provided by the embodiment of the present application, the system includes a controller 21, and N physical hard disks, figure 2 Taking N equal to 3 as an example, the three physical hard disks are respectively 22a, 22b and 22c. The physical hard disk may be an SSD, or an SSD disk frame (English: ...

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PUM

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Abstract

The invention discloses a physical hard disk wear leveling method, device and system used for solving the problem that an SSD wear leveling result is low in accuracy in the prior art. The method comprises the steps that a controller determines a logic address of to-be-written data and determines a second physical block in a second physical hard disk, wherein the number of times of erasure of the second physical block is smaller than the number of times of erasure of a first physical block, and the difference between the number of times of erasure of the second physical block in the second physical hard disk and the number of times of erasure of the first physical block is maximum among N physical hard disks; and when it is determined that the difference between the number of times of erasure corresponding to the first physical block and the number of times of erasure of the second physical block located in the second physical hard disk is greater than a preset threshold, the controllerexchanges data stored in the first physical block with data stored in the second physical block and stores the to-be-written data into the second physical block.

Description

technical field [0001] The present application relates to the field of storage technologies, and in particular to a method, device and system for wear leveling of physical hard disks. Background technique [0002] Due to its superior performance, a solid state disk (English: Solid State Disk, SSD for short) gradually replaces a traditional disk and is increasingly used in the storage field. Redundant Arrays of Inexpensive Disks 5 (English: Redundant Arrays of Inexpensive Disks 5, referred to as: RAID5) is a common data storage technology in the storage field, which improves the read and write performance and data security of hard disks. Therefore, applying RAID5 to SSD can effectively improve the read / write performance and data security of SSD. [0003] by figure 1 The RAID 5 composed of the physical hard disk 0 to the physical hard disk 3 shown is taken as an example to illustrate the method of applying the RAID5 to the solid-state disk. Among them, A1-A P Located in th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F3/06G06F11/10
CPCG06F3/0616G06F3/0652G06F3/0676G06F11/1048G06F11/1068
Inventor 徐晓忻廖义祥吴登奔
Owner XFUSION DIGITAL TECH CO LTD