You can run the show disabled command from the Oracle ILOM prompt to identify components that have been disabled either intentionally, by a user, or because of a fault.
-> show disabled Target | Property | Value -----------------------------------+----------------+-------------------- ... /SYS/CMIOU0/CM/CMP/BOB31/CH0/DIMM | disable_reason | Configuration Rules ...
-> show -t /SYS/CMIOU0/CM/CMP/BOB31/CH0/DIMM Target | Property | Value -----------------------------------+------------------------+------------ ... /SYS/CMIOU0/CM/CMP/BOB31/CH0/DIMM | type | DIMM /SYS/CMIOU0/CM/CMP/BOB31/CH0/DIMM | requested_config_state | Enabled /SYS/CMIOU0/CM/CMP/BOB31/CH0/DIMM | current_config_state | Disabled /SYS/CMIOU0/CM/CMP/BOB31/CH0/DIMM | disable_reason | Configuration Rules /SYS/CMIOU0/CM/CMP/BOB31/CH0/DIMM | fru_name | 16384MB DDR4 SDRAM DIMM ...