The IBM XIV Storage System is designed to be cost-efficient in all aspects, while delivering outstanding and consistent performance. Which of these features is currently UNAVAILABLE on the XIV system?

A.
single-tier architecture supports all kinds of storage in one environment and makes scaling easy

B.
built-in thin-provisioning allows the acquisition and installation of additional capacity to be delayed until needed.

C.
innovative use of solid state disk drives offers excellent capacity-for-cost value while meeting enterprise performance standards

D.
use of off-the-shelf components makes customized hardware unnecessary and makes it possible to integrate state-of-the-art hardware assoon as it becomes available.

Explanation: