Calculate the number of disk tracks traversed using the FCFS algorithms for the series of disk track service requests given as 54,36,21,74,46,35,26,67. At the time the first request arrives in the disk request queue, the read/write head is at track 50, moving toward the outer (lower-numbered)tracks. Draw the graph of the movement. Assume that the disk has 100 tracks from 0 to 99.

Calculate the number of disk tracks traversed using the SSTF algorithms for the series of disk track service requests given as 54,36,21,74,46,35,26,67. At the time the first request arrives in the disk request queue, the read/write head is at track 50, moving toward the outer (lower-numbered)tracks. Draw the graph of the movement. Assume that the disk has 100 tracks from 0 to 99.

Suppose that we want to schedule disk requests on a disk containing 200 cylinders numbered from 0 to 199. The Disk requests to be addressed are 82,170,43,140,24,16,189. And the Read/Write arm is at 48, and it is also given that the disk arm should move "towards the larger value". Q₁- Illustrate on a graph the total read/write head movement for the SCAN Disk scheduling algorithm. Q2- Calculate the total overhead movement (total distance covered by the disk arm).

Consider a disk subjected to I/O requests arriving (following Poisson distribution) at an average rate of  requests/second. Assume that on average, there were 5 requests waiting for service in the queue and that each request waits in the queue for about 10 milliseconds, on average. What is the effective arrival rate  for this disk?