A 4U controller assembly with two HSV210-B controllers, six M5314C 3U dual-redundant FC Loop 14-bay disk enclosures, and four 12-port FC loop switches. It can be Factory Configured with additional drive enclosures. It can also be field upgraded up to a 2C12D configuration with the addition of drive enclosures. With the addition of another rack the EVA8100 can support up to 2C18D.