Computer System, Computer Science, Hardware.
head over the track that contains the target sector. The time required to move the arm is called the seek time, typically 3 to 9 ms, up to 20 ms. 移动传动臂的时间，依赖于读写头之前的位置以及传动臂移动速度，通常在3～9ms，最高可达20ms。 Rotational latency 旋转时间（主要耗时） Once the head is in position over the track, the drive waits for the first