Question: Suppose that a disk drive has 5000 cylinders, numbered from 0 to 4999. The drive is currently serving a request at cylinder 2150. Previously, the

Suppose that a disk drive has 5000 cylinders, numbered from 0 to 4999. The drive is currently

serving a request at cylinder 2150. Previously, the head was at cylinder 1805. The queue of pending requests, in

order, is:

  • 2069, 1212, 2296, 2800, 544, 1618, 356, 1523

Starting from the current head position, what is the total distance (in cylinders) that the disk arm moves to

satisfy all pending requests for:

  • SSTF disk scheduling policy (5 points).
  • SCAN disk scheduling policy (5 points).

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