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针对异或门非易失性闪存(NOR flash)的特点,提出了一种扇区映射策略。通过在系统中建立一个转换层,将普通的NOR flash模拟成磁盘设备,从而可以在其上部署普通的磁盘文件系统。同时,描述了垃圾收集块选择算法,实现了对NOR flash访问的损耗均衡。对该磁盘模拟方法的系统需求、性能和可靠性做了分析,提出了优化方法。
Aiming at the characteristics of NOR flash, a sector mapping strategy is proposed. By building a translation layer in the system, a generic NOR flash can be emulated as a disk device on which ordinary disk file systems can be deployed. At the same time, the garbage collection block selection algorithm is described, and the loss equalization of NOR flash access is realized. The system requirements, performance and reliability of the disk simulation method are analyzed, and the optimization method is proposed.