计算机应用

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基于NAND Flash的嵌入式文件系统的改进与优化

杨春林 雷航   

  1. 电子科技大学计算机学院嵌入式实时计算研究所 电子科技大学计算机学院嵌入式实时计算研究所
  • 收稿日期:2007-07-16 修回日期:1900-01-01 发布日期:2007-12-01 出版日期:2007-12-01
  • 通讯作者: 杨春林

Improvement and optimization of embedded file system based on NAND Flash

Chun-lin YANG Hang LEI   

  • Received:2007-07-16 Revised:1900-01-01 Online:2007-12-01 Published:2007-12-01
  • Contact: Chun-lin YANG

摘要: 以NAND Flash为介质的嵌入式文件系统主要存在两方面的不足:启动加载过长、对磨损平衡考虑不足。针对这两点不足,实现了一个新的NAND Flash文件系统,它通过改变数据节点的管理,将文件的控制信息和数据信息分开存储,缩短了启动加载时间;通过在垃圾回收时使擦除块交替存储冷热数据,实现了各擦除块间的磨损平衡。

关键词: 嵌入式文件系统, NAND Flash, YAFFS

Abstract: At present, the embedded flash file systems specially designed for NAND Flash mainly have two disadvantages: too long booting time and insufficient consideration for wear leveling. According to these two aspects, a new NAND flash file system named SFFS was proposed, which shortened the booting time through changing the management of data nodes and storing the controlling information and data information separately,and made wear leveling better through using a block to store hot data and cold data alternatively.

Key words: embedded file system, NAND Flash, YAFFS

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