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存储子系统容量已不再是一两台磁盘机的容量,磁盘机阵列和分布存储系统必须提供几百吉字节或几太(10~(12))字节的数据以满足今天和明天的应用需要.并行线缆技术如IDE和SCSI能够在机柜的有限空间内实现这种目标,但含有40线、68线或更多线数的粗重并行线缆很不容易在房间与房间之间、楼层与楼层之间进行布线.因此,许多公司开始采用数据传输速度相当于现有的并行线缆或更快的串行线缆技术.最受推崇的三种串行接口方案是:IBM公司开发的串行存储结构(简称SSA);在Fiber Channel(FC)基础上由全行业开发的串行接口,IEEE P1394高速串行总线(Apple Computer公司称之为FireWire).它们提供的数据传输速度从低档P1394的100Mbps(12.5M
Storage subsystem capacity is no longer the capacity of one or two disk drives. Disk array arrays and distributed storage systems must provide hundreds of gigabytes or few (10-12) bytes of data to meet today’s and tomorrow’s Application Requirements Parallel cable technologies such as IDE and SCSI can achieve this goal within the confines of a cabinet, but heavy, parallel cables with 40, 68, or more lines of wire are not easy to move between a room and a room, Floor to floor, many companies are starting to use data transfer speeds equal to existing parallel or faster serial cable technologies.The three most highly recommended serial interface solutions are: IBM Corporation Development (SSA), a serial interface developed by the industry based on Fiber Channel (FC), and the IEEE P1394 high speed serial bus (called FireWire by Apple Computer). They provide data transfer speeds ranging from Low-end P1394 100Mbps (12.5M