磁盘阵列是解决计算机Ｉ／Ｏ瓶颈问题的有效方法之一，通过对现有磁盘阵列结构的研究，提出了４种改善磁盘阵列性能的方法，即充分利用磁盘带宽，平衡多盘的负载，减少奇偶检验数据存取时间和磁盘阵列Ｃａｃｈｅ技术等。分析结果表明：在事务处理应用领域，利用Ｃａｃｈｅ来把小写转化为大写可大大改善外存的性能，平衡Ｃａｃｈｅ开销和阵列性能的提高是磁盘阵列设计的重点内容，在目前一般情况下，以一道数据大小来作为磁盘的基本存取大小是合适的选择，磁盘阵列负载平衡设计不仅是指正常模式下系统请求在多盘间负载平衡，而且在降级和重构模式下阵列内部的数据重构请求也应在多盘间平衡，利用备份磁盘作读写优化来减少奇偶检验数据存取时间是一种低Ｃａｃｈｅ开销，可有效改善阵列性能的方法 Disk array is one of the effective methods to solve the bottleneck problem of computer I / O. Based on the research of the existing disk array structure, four methods to improve the performance of disk array are put forward. That is to take full advantage of the disk bandwidth, balance the load of multiple disks and reduce Parity check data access time and disk array Cache technology. The analysis shows that in transaction processing applications, the use of Cache to convert lowercase to uppercase can greatly improve the performance of external memory. Balanced Cache overhead and array performance improvement are the key contents of disk array design. Under the current general situation, The size of the data as the disk’s basic access size is the right choice. Disk-array load-balancing design refers not only to load balancing among systems in normal mode, but also to reorganize requests within the array in degraded and refactored mode It should also be balanced across multiple disks, use the backup disk for read and write optimization to reduce the parity check data access time is a low Cache overhead, can effectively improve the performance of the array