The time it takes to complete an I/ O request ( referred to as disk latency) is a combination of seek time, rotational latency, and disk transfer time. 而完成一次I/O请求(称为磁盘延迟时间)所需要的时间是寻道时间、旋转延迟时间和磁盘传输时间之和。
When combined, the cache capacity on the drive, the disk algorithms used, the interface speed, and the areal density, produce a disk transfer time. 驱动器上的缓存容量、所使用的硬盘算法、接口速度和磁录密度组合到一起,就构成了磁盘传输时间。