The Storage centric rack versions of HPE 3PAR StoreServ 8000 are for CTO (factory Configure-To-Order) only. With a Storage centric configuration, the storage system gets placed in the center of the rack so that future expansion of that storage system becomes easier. In Storage centric configurations, non-3PAR components, with the exception of certain StoreFabric Storage Networking switches, if added to the same order, get placed in a separate rack.