The following table lists the system components and identifies whether they are hot, warm, or cold service components, and whether they are a customer-replaceable unit (CRU) or a field-replaceable unit (FRU).
Hot service components can be serviced while the server is powered on and running in full-power mode.
Warm service components can be serviced while the server is in standby power mode. These include CMODs, DIMMs, and processors and heatsinks.
Cold service components must be serviced when the server is completely powered off and disconnected from the power source.
See Hot, Warm, and Cold Service.
A CRU or FRU designation determines who is qualified to service a component.
CRUs can be serviced by customers. See Customer-Replaceable Units.
FRUs must be serviced by qualified Oracle Service personnel. See Field-Replaceable Units.