Which disk scheduling algorithm selects the disk request that is closest to the current position of the disk head?

Options

  • A. FCFS
  • B. SSTF
  • C. SCAN
  • D. More than one of the above
  • E. None of the above

Correct Answer (Detailed Explanation is Below)

B. SSTF

Detailed Explanation

Explanation: SSTF (Shortest Seek Time First) selects the pending request that requires the minimum head movement from the current disk-head position. It can provide lower average seek time than FCFS, but distant requests may suffer from starvation.