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围绕分布式冗余磁盘（DRD）系统的设计与实现，提出了集中分布和完全分布两个重要概念。分析了DRD系统的实现层次及操作系统的关系。在此基础上，介绍了系统的若干关键实现技术，最后对系统的可靠性进行了分析。
Focusing on the design and implementation of distributed redundant disk (DRD) system, two important concepts of centralized distribution and complete distribution are proposed. Analyzes the realization level of DRD system and the relation of operating system. On this basis, introduced some key technologies of the system, and finally analyzed the reliability of the system.