Within the Sun Blade 8000 Series, certain customer-replaceable units (CRUs) and field-replaceable units (FRUs) are hot-pluggable. Hot-pluggable components can be removed and installed while the system is running, without affecting the rest of the system's operations. However, you must prepare the operating system prior to the hot-plug procedure by performing certain system administration tasks. See Prepare Components for Hot-Remove Operation and Verify Hot-Insert Operation.
The system continues to operate normally during a hot-plug operation of redundant components. However there are constraints as to the period of time you can perform removal and replacement of certain components. Refer to specific service procedures for that information.
The following components of the system are hot-pluggable:
Server Modules (blades)
Power supply modules
Network Express Modules
PCI Express ExpressModules (Sun Blade 8000 Chassis only)
Chassis Monitoring Module
Hard disk drives
Front fan modules (Sun Blade 8000 Chassis only)
Rear fan module
Certain components can be serviced only when all power has been removed from the component, and in some cases, when the system is disassembled adequately. For example, before you can service the CPUs, heatsinks, memory modules (DIMMs or FB-DIMMs), you must physically remove the blade from the chassis, which necessitates removal of the blade power. See Power Off System Before Service.
You must remove power to service the following components:
I/O chassis
Rear fan cage
Front fan tray (Sun Blade 8000 Chassis only)
Memory modules
CPUs
Heatsinks
Each component is discussed in detail in other topics.