Finding average number of tracks traversed by a seek


#1

consider a disk with N tracks numbered from 0 to N-1 and assume that requested sectors are distributed randomly and evenly over the disk.we want to caluclate the average number of tracks traversed by a seek.
first calculate the probability of a seek of length j when the head is currently positioned over track t.


#2

Refer this pdf, might be helpful for you

http://www.cs.sfu.ca/CourseCentral/300/jregan/assignments/ass3/assignment3sol.pdf