Given a typical magnetic hard drive with five platters, answer the following:
A. How many recordings surfaces would you expect it to have?
B. How many read/write heads would it need to serve all recording surfaces?
C. How many arms holding read/write heads would it need?

Given the number of platters =5

A. Hence, the number of recording surface =10

B. number of read-write heads =10

C. Number of arms holding the read-write heads = 10

Explanation:

We know that number of recording surface = 2 *( number of platters)

= 2*5=10

And the number of read-write heads = number of recording surface= 10

Also, number of arms holding the read-write head = one for each read-write head= 10

And hence, the above answer.