Question

A disk takes 1 ms per track seek time , and the is head is currently on track 50. Assume it takes 5 ms to service a request on the head is at right track. The following set of requests are pending , given as (ID , track) in order of arrival. What is the order in which requests are service if the police is SSF( aka SSTF)

Requests ( A, 3, 55) , (B,4, 53) , (C,8,40) , (D,10,48) , (E,32,45)

Given the service order as sequence of IDs without spaces or comas so FCFS would have order ABCDE

What is the elevator service order ?

Answer 1

In elevator, it continues to travel in its current direction until empty, then only it takes reverse and cimpleco other requests.

At first, it initiates the action with nearest track first.

Let me know if you have any doubt