Computer System, Computer Science, Hardware.
seeks to the correct track, then wait for the cylinder to rotate to the target sector. Three time costs are used to measure disk performance. 磁盘用读/写头寻道seek指定的track后做读写操作。每个盘片处于同一柱面cylinder上。用三个时间衡量磁盘性能： Seek time 寻道时间（主要耗时） To read the contents of some target sector, the arm first positions the