A customer plans to roll out several experimental largescale host clusters with lowcost blades for computationally intensive workloads. All IS operations are in a single data center (50 m x 40 m). They use directattached storage on all hosts. For better manageability of storage, they are considering a SAN infrastructure with CLARiiON storage (CX340s). Preliminary design calls for 200 server blades.
Cost and performance are both critical considerations, but high availability is not. Your initial design has singlepathed FC connectivity to each host. Under sustained load, each server blade can sustain up to 4,000 IOPS at 16 KB per I/O.
Which additional information do you need before you can attempt a preliminary, highlevel SAN design for this environment?

A.
Breakdown of I/O traffic by customer application

B.
Customer’s current disaster recovery strategy

C.
Expected cache hit rates on the storage arrays

D.
Server model/make, OS type and revision, clustering software