单项扫描调度算法的基本思想是，不考虑访问者等待的先后次序，总是从0号柱面开始向里道扫描，按照各自所要访问的柱面位置的次序去选择访问者。在移动臂到达最后一个柱面后，立即快速返回到0号柱面，返回时不为任何的访问者等待服务。在返回到0号柱面后，再次进行扫描。-Single scan scheduling algorithm is the basic idea is that visitors do not consider waiting for the order, always starting from cylinder 0 to scan in the road, in accordance with their respective cylinder to access the order to choose the location of visitors. In the mobile arm reaches the last cylinder immediately after the cylinder quickly returns to 0, returns without waiting for any visitor services. Return to 0 in the cylinder after the scan again.