3a. Explain the trade-off present when reordering disk requeststo minimize seek time.
Assume that it takes 2 ms for the read-write head to move 1track on the disk.
b. Compute the amount of seek time necessary to move theread-write head in a FCFS fashion with the read-write head startingat track 7 based on the following sequence:
Track 14, Track 2, Track 9, Track 18, Track 20
c. Compute the amount of seek time necessary for the abovesequence to move the read-write head in a SSTF fashion.
d. Assume that the cost of reordering the tracks is 10 ms. Willthe reordering be cost effective in this
OR
OR