A customer currently has an EMC CLARiiON. They are very impressed with the ease of use of the Storwize V7000 management interface, and are very interested in the external virtualization capability…

A customer currently has an EMC CLARiiON. They are very impressed with the ease of use of the Storwize V7000 management interface, and are very interested in the external virtualization capability. However, they do not have any immediate need for additional capacity. What is the minimum internal disk drive requirement necessary for the customer to derive value from a new Storwize V7000?