None of the disk-scheduling disciplines, except FCFS, is truly fair (starvation may occur).
i. Explain why this assertion is true.
ii. Describe a way to modify algorithms such as SCAN to ensure fairness.
iii. Explain why fairness is an important goal in a time-sharing system.
iv. Give three or more examples of circumstances in which it is important that the operating system be unfair in serving 1/O requests.