Abrasion equilibrium method and device

A wear leveling and physical block technology, applied in the storage field, can solve the problem of slow search of physical blocks and achieve the effect of reducing wear and tear

Active Publication Date: 2011-10-19
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, with the continuous improvement of storage capacity, the number of physical blocks...

Method used

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  • Abrasion equilibrium method and device
  • Abrasion equilibrium method and device
  • Abrasion equilibrium method and device

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Embodiment Construction

[0102] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and examples.

[0103] The present invention mainly determines the pool mask of each physical block according to the erasing times of each physical block; wherein, for different times of erasing, the mask of the physical block is a cold pool mask CPM, a common pool mask NPM or Hot pool mask HPM (for convenience of description, physical blocks with cold pool masks are called cold pool blocks, physical blocks with common pool masks are called normal pool blocks, and physical blocks with hot pool masks are called The block is called a hot pool block); during static balancing, when the pool mask of a physical block with a pool mask of NPM changes to HPM, copy the data in a physical block with a pool mask of CPM to the pool The mask becomes the physical block of the HPM, an...

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Abstract

The invention discloses an abrasion equilibrium method comprising a pool mask of each physical block according to erasing times of each physical block, wherein for different erasing times, the pool mask of the physical block is determined as CPM (Cold Pool Mask), NPM (Normal Pool Mask) or HPM (Hot Pool Mask); when the pool mask of the physical block becomes into HPM from NPM, data in the physicalblock in which any pool mask is CPM is copied onto the physical block in which the pool mask is HPM, and the physical block in which the pool mask is CPM is recycled as rubbish. The invention furtherdiscloses an abrasion equilibrium device, and the method and the device can reduce the extra abrasion caused by abrasion equilibrium.

Description

technical field [0001] The invention relates to the field of storage technology, in particular to a wear leveling method and device. Background technique [0002] At present, non-volatile memory is widely used in computers, communications and consumer electronics products; for example, U disk, MP3, digital camera, mobile communication terminal, solid-state hard disk and other products Volatile memory as a storage medium. As the storage capacity requirements of these products continue to increase, the process size of non-volatile memory continues to shrink, causing the reliability of non-volatile memory to face more and more severe challenges, especially the erase operation of non-volatile memory The number of erasures of the smallest unit physical block is limited, which will have a serious impact on the service life of the non-volatile memory. For the problem that the number of erasures of physical blocks is limited, the existing technology is to perform wear leveling on ...

Claims

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Application Information

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IPC IPC(8): G06F12/06
Inventor 潘立阳唐晨
Owner TSINGHUA UNIV
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