A new EMC customer recently installed their first VMAX and a complete suite of EMC

management tools. Their lead capacity planner attended training and has started monitoring the
VMAX. You receive a call and this person describes the measurements observed. During the
period of heaviest workload, reported I/O rates on certain Fibre Channel ports is nearing
2,000/second but those ports only display about 10% utilization. What is the likely cause?

A.
I/O block size is very small

B.
I/O block size is very large

C.
Striped metavolumes report invalid IOPS

D.
Sequential prefetch skews throughput %

Explanation: