31Removing the ControllerLoosen the screws (1) under the ejection levers (2).Push ejection levers downwards and the controller will ease out from chassis.Installing the ControllerInsert the controller slowly into the module slot. When you feel the contact resistance, useslightly more force and then push both of the ejection levers upwards (indicated by the bluearrows) to secure the controller into chassis.Secure the controller by fastening the two retention screws (1) under the ejection levers (2).System ConnectionThis chapter outlines the general configuration rules you should follow when cabling astorage system and introduces basic information about topologies. You can use thesetopologies or refer to them as a guide for developing your own unique topologies. Acomplete description of the power-on and power-off procedures is also given in this chapter.General Considerations on Making ConnectionsWhen selecting the number of hard drives to be included in a logical drive, the host channelbandwidth and the mechanical performance of individual disk drives should be considered.