About Hot-Pluggable Components

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.

Components That Are Hot-Pluggable

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

Components That Are Not Hot-Pluggable

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.