1 A magnetic disk drive has the following characteristics 1

1. A magnetic disk drive has the following characteristics:

- 10,000 rpm spin rate

- 2 ns head-to-head switching time

- 3 s average track-to-track seek time

5 platters, 1024 tracks/platter side recorded on both sides, sectors per track on all tracks

questions:

a. what is the drive\'s storage capacity

b. How long will it take to read the drive\'s entire contents sequentially

c. What is the drive\'s serial access time

d. What is the drive\'s average (random) access time (asuming movement over half the tracks and half the sectors in a track)?

2. A CPU has a clock rating of 2.4 GHz, and half of each clock cycle is used for fetching and the other half for execution.

question:

a. What access time is required of primary storage for the CPU to execute with zero wait states?

2) clock rate is 2.4 GHz

i.e 2.4*10^9 cycles per second

Access time for half cycle=1/2.4*10^9/2 seconds

=0.20833334 * 10^-9 seconds = 0.2083 nanoseconds