操作系统\磁盘调度 磁盘调度的4种调度方式: 先来先服务调度\最短寻道时间优先调度算法\单向扫描/循环扫描调度算法-Operating System \ disk scheduling the four scheduling disk scheduling methods: first-come first-served scheduling \ shortest seek time first scheduling algorithm \ one-way scan/scan sch