Design And Research Of High Performance RAID Equipment

In recent years information industry based on computer and network gains unprecedented development and proposes a higher requirement for the technology of information storage. It is mainly embodied in the following aspects: memory capacity of mass date, reliability of memory system, adaptability to different types of data storage, high bandwidth and security of data access and providing effective solution to data memory.Although of enhancing the performance of disk through improving on its manufacture craftwork and the technology of magnetic head, the disk, working as the part of machine electricity, is restrained by the inertia of mechanic performance, whose I/O performance has reached its wit end of promotion. In order to solve such problem, the RAID array that adopt redundancy technology appears. Data cent technology is adopted in RAID array, that means the parallel operation in many disks. The I/O respond time is improved, the same time the reliability and security of disk array is highly improved by the technology of redundancy and permitting mistakes.The paper studies much key technology of RAID design, including the management of Cache, data distribution, the equalization of data memory, the supervision of disk performance, the optimization of disk performance and so on, discusses the importance of all kinds of key technology in different applications of RAID. In RAID system design, optimum performance is gained through equalizing diversified RAID key technology in different application environments.The paper designs a kind of solution independent PC system with high performance disk array's system, which adopts the structure of SOPC, the core of FPGA in which the MCU of 32 RISC instruction gather of NIOS, FLASH interface, SDRAM interface, interrupt controller DMA and DMA controller etc are established. In system hardware design, data pipeline of the separation of reading and writing, which aims at data memory control-flow analysis in RAID and reduces the resource's expanse of memory system, is established. UCOS real-time operation system is applied. Different modes of software control, which aim at different usage environment and enhance RAID system performance and data dependability, are designed. The project can be applied in compatible PC system, which can be used for the public and commercial purpose and in self-defined, financial and military system.The technology of large-scale information storage is on the ascendant. THE Requirement for disk array is coming larger and larger with thedevelopment of information popularization in various fields, especially in high-tech industries, financial reorganization and national security department, where the reliable and highly secure disk storage system are required. So the research of RAID system contains profound value and wide future.