Customer added three new servers to an existing SAN consisting of two fabrics. Each fabric
consists of two switches with two ISLs. This change negatively impacted performance. Throughput
is as follows: 20MB/s on Host HBAs at 4K block size 50MB/s on Symmetrix on the FA ports
60MB/s on each ISL port The physical disks are 80% utilized but with 100% cache-hit ratio. What
should the customer do to improve performance?

A.
Add two FA ports to the storage

B.
Add more disks to the storage

C.
Add two ISLs to the fabric

D.
Add 16k to the block size