固态存储的可靠性安全性理论及控制器关键技术研究

It is an important storage medium because solid state storage has so many advantages such as high-speed read and write performance, low power and small form-factor. A solid-state storage controller is the brain of a storage device, and it determines the whole storage system’s performance. Today’s storage industry is dominated by several giant companies in the United States. The research work on solid state storage system’s reliability and security is valuable not only in the academic field, but also from the view of the nation’s information security. This project is focusing on the reliability and security issues in high density storage devices with state-of-the-art controller technologies, including multiple CPU co-processing under complicated constraints, self-adaptive dynamic error correction, multi-dimension data management optimized by statistic models, high speed data encryption & decryption, modeling for memory cell’s life-time estimation and optimization, etc. Furthermore, the project aims to dig deep in parallel running architecture for multiple memory channels, memory cell modeling, reliability analysis. Applying multi-dimension data management strategy, data encryption and decryption algorithm will be realized with hardware circuit in a controller. It will make a breakthrough in solid state drive controller’s reliability and security design, and present a new system level prototype. This work will accumulate enough experience and theoretical achievements for China’s solid-state drive controller design. It is theoretical foundation for the solid-state storage controller chip and preliminary study for the localization of SSD.

固态存储，具有快速读写、低功耗及易携带等优点，已成为一种重要的存储媒质。固态存储控制器是固态存储设备的大脑，决定了固态存储设备的性能。当前存储产业垄断在美国公司手中，无论从学术研究，还是从国家信息安全建设的而言，固态存储的可靠性和安全性及控制器关键技术的研究都具有重大的意义。本课题针对固态存储控制器在新型高密度存储器中面临的存储可靠与安全问题，围绕复杂约束条件下的多CPU协同处理、基于负载特性的自适应动态差错控制、基于统计模型优化的多维数据管理调度、高速数据加/解密、存储单元寿命的评价模型与优化等科学问题，开展存储控制器的并行体系架构、存储单元的失效模型及可靠存储机制研究，通过对多维度数据管理调度策略实现与数据安全机制在控制电路中的应用研究，突破固态存储控制器可靠与安全设计现有理论与方法的局限，研发新的原型系统，为固态硬盘国产化做好前期研究，以期提高我国固态存储控制器设计水平和和研发能力。

固态存储，具有快速读写、低功耗及易携带等优点，已成为一种重要的存储媒质。固态存储控制器是固态存储设备的大脑，决定了固态存储设备的性能。当前存储产业垄断在美国公司手中，无论从学术研究，还是从国家信息安全建设的而言，固态存储的可靠性和安全性及控制器关键技术的研究都具有重大的意义。本课题针对固态存储控制器在新型高密度存储器中面临的存储可靠与安全问题，围绕复杂约束条件下的多CPU协同处理、基于负载特性的自适应动态差错控制、基于统计模型优化的多维数据管理调度、高速数据加/解密、存储单元寿命的评价模型与优化等科学问题，在3D闪存介质特性及寿命预测、LDPC纠错编码，数据调度分布策略方法，新型固态存储器架构，二维纠错算法，软硬件协同优化，数据库索引算法优化和固态硬盘寿命分析等方向，展开了深入的研究。本项目至结题共已发表SCI收录论文20篇，CCF B类会议论文4篇，CCF C类会议论文2篇，一级学报论文2篇，共计28篇。本项目获得授权美国专利3项，中国发明专利共计31项。项目成果获得2018年度浙江省科技进步二等奖；获得2019年度浙江省科技进步二等奖；获得2020年度国家科技进步二等奖，本项目研究为固态硬盘国产化奠定了坚实的基础，提高了我国固态存储控制器设计水平和研发能力。