A、Cards can be added and then enabled via Hardware Management Console (HMC) GUI or command line. 

B、The HMC allows access to the Advanced System Management Interface (ASMI), where the slots can be managed. 

C、If the empty slot was already allocated to an LPAR, the LPAR can use the card after the cfgmgr script has been run. 

D、The Hardware Management Console (HMC) GUI can guide a customer through the process of adding a card to an empty slot.