A disk head is initially at cylinder 40. The FCFS request sequence is 10, 50, 20. What is the total head movement?
Options
- A. 100 cylinders
- B. 90 cylinders
- C. 80 cylinders
- D. More than one of the above
- E. None of the above
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Correct Answer (Detailed Explanation is Below)
A. 100 cylinders
Detailed Explanation
Formula: |10-40| + |50-10| + |20-50| = 30 + 40 + 30 = 100 cylinders.
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