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Modular flash memory management system based on nand technology

A flash memory management and modularization technology, applied in the direction of memory address/allocation/relocation, etc., to achieve the effect of reducing write amplification ratio, improving performance and reliability, and reducing overhead

Inactive Publication Date: 2016-04-27
宜兴市华星特种陶瓷科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These characteristics make it impossible for us to directly read, write and modify data on NAND flash memory like a hard disk

Method used

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  • Modular flash memory management system based on nand technology
  • Modular flash memory management system based on nand technology

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Experimental program
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Embodiment Construction

[0017] In order to make the technical means, creative features, goals and effects achieved by the present invention easy to understand, the present invention will be further described below in conjunction with specific illustrations.

[0018] like figure 1 and figure 2 As shown, the modularized, high-performance, high-reliability modular flash memory management system based on NAND technology described in the present invention has four modules at its core: MTD module, which abstracts and manages flash memory devices; UBI module, which manages flash memory The physical block resource provides an abstract logical block operation interface, and performs bad block processing and wear balancing operations; the FTL module manages the physical page resources of the flash memory, and uses the page mapping mechanism to realize the allocation and recovery of physical page resources, and maintain Logical page to physical page mapping; BUF module manages memory allocation, allocates mem...

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Abstract

The invention discloses a modular flash memory management system based on NAND technology. It mainly includes: 1. MTD module used to abstract and manage NAND devices; 1. UBI module used to manage flash block resources, and do bad block processing and wear balance; 1. Used to manage flash page resources, using page mapping , an FTL module that realizes the allocation and recycling of page resources; a BUF module that is used to manage the allocation of SRAM memory, and collects adjacent continuous sectors into pages in SRAM; the BUF module first converts the sectors of adjacent logical addresses Collected into a page, the FTL module maps the logical page address of the page to the logical block address and the page offset within the block, the UBI module maps the logical block address to the physical block address, and the MTD module writes the data into the physical block In the physical page of the block, the actual write operation to the NAND device is completed.

Description

Technical field: [0001] The invention relates to the technical field of data storage and NAND flash memory, in particular to a modular flash memory management system based on NAND technology. Background technique: [0002] As we all know, NAND flash memory has become an important storage medium in consumer electronics, industrial control, data processing and other aspects. The reason is that NAND flash memory has many excellent features, such as: low power consumption, anti-vibration, read and write without seek time, etc. These characteristics allow NAND technology to replace or improve mechanical hard drives. [0003] However, NAND flash memory technology also has limitations and deficiencies in some aspects, for example: before performing a write (program) operation on a page (page), the block (block) where the page is located must be erased (erase). The erasing times (EraseCount, EC) of each block has a certain limit, and the size of the page and the block is not consi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F12/02
Inventor 储章生储鹤
Owner 宜兴市华星特种陶瓷科技有限公司