Operating Systems - Old Questions

3.  Suppose the head of a moving head disk with 200 tracks, numbered 0 to 199 is currently serving request at tracks 143 and has finished a request at track 125. The queue it request is kept in the FIFO order 86, 147, 91, 177, 94, 150, 102, 175, 130. What is the total head movements needed to satisfy these request for the following disk-scheduling algorithms?

i) FCFS     ii) SSTF      iii)SCAN     iv)LOOK