I have  a system where disk requests come to a disk drive for cylinders in the order 10, 22, 20, 2, 40, and 38 at a time when the disk drive is reading from cylinder 20.  The seek time is 6ms per cylinder.  I have to find total seek time if the disk scheduling algorithm is First-Come-First-Serve (FCFS).To find the answer I used a formula:total seek time=0.254*sqrt(d)(for each cylinder and sum them)But that gave the incorrect result.What formula(s) should I be using to handle questions like this?
Calculating disk seek times
operating systems;memory hardware