Using the HMC to install expansion rack storage enclosures Procedure Read the following step. Find the expansion rack that you are installing: Model 98B Rack-2 or Rack-3, go to Routing FC-AL cables, model 98B. Model 98E Rack-2 go to Installing and testing the Rack-2 storage enclosures. Model 98E Rack-3, Rack-4, or Rack-5 go to Routing FC-AL cables, Model 98E.