A new data warehouse will be hosted on an existing 4-engine VMAX array. The database server
has 4 HBAs connected at 4Gb/s. Due to limited SAN switch ports only port 0 on each VMAX FA is
connected – also at 4Gb/s.
The workload is expected to require at least 2300MB/s of reads at 128KB I/O size and must
maintain performance in case of any major component failure in the host, switch or array. Assume
that the existing workload on the VMAX does not exceed 100MB/s per port and assume that the

ports can sustain up to 300MB/s without exceeding 70% utilization.
What is the minimum number of FA ports needed to spread the workload evenly across all 4
VMAX engines and meet the above performance requirements?

A.
16 FA ports, 4 per engine

B.
12 FA ports, 3 per engine

C.
16 FA ports, 4 per director

D.
24 FA ports, 3 per director

Explanation: