摘要
阐述针对星载高速大容量存储中用户资源紧张、闪存控制器通用性低、数据迁移导致吞吐速率骤降的问题,在并行闪存阵列的基础上研究和设计嵌入式文件管理方案.一方面,通过文件管理控制设计,基于FPGA硬件实现地址映射、坏块管理、顺序块分配等功能以节省用户资源,同时避免对高速存储非常不友好的数据迁移问题.另一方面,通过文件信息存储设计,使方案具备防意外掉电和快速启动能力,同时减轻对外部器件的依赖,有利于提高闪存阵列及其控制器的通用性和灵活性.最后,对文件管理方案进行文件信息存储可靠性分析和文件管理控制仿真,从而应用在通用嵌入式NAND闪存控制器中.
Abstract
This paper expounds that the high-speed large-capacity storage tasks on satellites,there are some problems such as tight user resources,low versatility of flash memory controllers,and data migration caused a sudden decline in throughput.To solve these problems,study and design embedded file management solutions on parallel flashing arrays.There are two main aspects of the scheme.On the one hand,through file management control design,the functions of address mapping,bad block management,sequential block allocation are implemented on FPGA hardware to save user resources,and avoiding very unfriendly data migration problems for high-speed storage.On the other hand,through file information storage design,enable the scheme to have the ability to prevent accidental power outage and quick start,and reducing the dependence on external devices is conducive to improving the generality and flexibility of flash memory arrays and its controller.Finally,based on the simulation platform,the file information storage reliability analysis and file management control simulation is performed on the file management solutions.In the high-speed large-capacity storage on the satellite,this scheme has certain reference value and practical value,and is hoped to apply it on a universal embedded NAND flash memory controller.
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