Q47,paper 2,j 13 Assuming that the disk head is located initially at 32, find the number of disk moves required with FCFS if the disk queue of I/O block requests are 98, 37, 14, 124, 65, 67 :

(A) 310

(B) 324

(C) 320

(D) 321

Answer D.

Explanation.

Initially head is at 32. Scan is FCFS.

(32 to 98)+(98to37)+(37to14)+(14 to 124)+(124 to 65)+(65to 67)

66+61+23+110+59+2.=321.