If the Disk head is located initially at track 32, find the number of disk moves required with FCFS scheduling criteria if the disk queue of I/O blocks…
If the Disk head is located initially at track 32, find the number of disk moves required with FCFS scheduling criteria if the disk queue of I/O blocks requests are: 98, 37, 14, 124, 65, 67
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Correct answer: (C) 321
Explanation
Given I/O requests: 98, 37, 14, 124, 65, 67, head at 32. Using FCFS scheduling, total disk moves = (98 – 32) + (98 – 37) + (37 – 14) + (124 – 14) + (124 – 65) + (67 – 65) = 66 + 61 + 23 + 110 + 59 + 2 = 321