Disk Scheduling - General Questions

SSTF disk scheduling may cause:

The disk head is at cylinder 104. Requests arrive in the order 30, 121, 122, 168, 167, 164. What is the total head movement (in cylinders) using SSTF?

The disk head is at cylinder 89. Requests arrive in the order 197, 24, 69, 190, 32, 162, 14. What is the total head movement (in cylinders) using FCFS?

The disk head is at cylinder 46. Requests arrive in the order 58, 127, 122, 67, 24, 25. What is the total head movement (in cylinders) using FCFS?

The disk head is at cylinder 74. Requests arrive in the order 149, 92, 28, 5, 93. What is the total head movement (in cylinders) using SSTF?