NANDFlash在嵌入式文件系统中的一种动态管理方法  

A DYNAMIC MANAGEMENT METHOD FOR NANDFlASH IN EMBEDDED FILE SYSTEM

作　　者：王新华[1] 王建芬[1] 

机构地区：[1]浙江科技学院信息与电子工程学院,浙江杭州310023

出　　处：《计算机应用与软件》2008年第9期95-98,共4页Computer Applications and Software

基　　金：浙江省教育厅科研资助项目(20061473)

摘　　要：针对NANDFlash的使用特性,提出了一种适用于嵌入式文件系统的动态逻辑映射表及其管理算法。通过该表的动态滚动可以均衡NANDFlash中块的使用频率、延长器件使用寿命,同时给出了垃圾块的回收策略和脏数据的判别方法。该算法采用查表的方式解决动态滚动中出现的速度问题,使算法效率高、软件开销少,并得到了实际验证。Considering the characteristics of NANDFlash, the dynamic Logical - Physical Conversion Table with its management method is proposed, which is suitable for embedded file system. By scrolling the dynamic table the operating opportunity of blocks in NANDFlash is balanced, so device lifetime is extended. Also the recycle algorithm of invalid blocks and estimate method of dirty data are provided. The problem of software speed arisen from block scrolling is solved by table look - at, so the algorithm has high efficiency and small software overhead. This algorithm was verified effective in practice.

关 键 词：NAND闪存 动态逻辑映射表 均衡 冗余字节 

分 类 号：TP316.2[自动化与计算机技术—计算机软件与理论] TP334.7[自动化与计算机技术—计算机科学与技术]