Assignment:
Consider a two-platter disk with the following parameters:
Number of heads = 4 (one head for each surface of the platters)
Rotation speed = 7200 rpm
Number of tracks on one side of the platter = 30 000
Number of sectors per track = 600
Number of bytes per sector = 512 bytes
Seek time = one ms for every hundred tracks traversed.
Let the disk receive a request to access a random sector on a random track and assume that the head starts at track 0 (the outmost track of the disk).
a. What is the average access time?
b. What is the transfer time for a sector?
c. What is the total average time to satisfy a request?
d. What is the total capacity of the disk?