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1.引言随着计算机技术的发展,CPU的运算速度越来越快,但磁盘存储系统速度的提高却远远跟不上CPU速度的提高。这种差别导致在许多计算机系统中,存储系统成为系统性能的瓶颈。磁盘的存储容量和存取速度的发展是不平衡的。磁盘存储容量以每年一倍的速度发展,而磁盘的存取时间仅仅每年
1. Introduction With the development of computer technology, the computing speed of CPU is getting faster and faster, but the speed of disk storage system is far behind the improvement of CPU speed. This difference has led to storage systems becoming bottlenecks in system performance on many computer systems. The development of disk storage capacity and access speed is not balanced. Disk storage capacity is growing at twice a year, while disk access is only yearly