Question

Suppose the following disk request sequence (track numbers) for a disk with 200 tracks is given: 23, 89, 132, 42, 97, 35, 187 Assume that the initial position of the R/W head is on track 100. Draw the diagrams for arm movement for the seek strategies given below. Calculate the total and average number of tracks travelled and conclude which strategy performed best in the given scenario.

a) FCFS b) SSTF c) SCAN d) C-SCAN e) LOOK f) C-LOOK

Answer 1