2 Sun Fire V890 Dynamic Reconfiguration User’s Guide • August 2004
About Hot-Plug and Hot-Swap
Operations
Sun Fire V890 system hardware is designed to support hot-plugging of Peripheral
Component Interconnect (PCI) cards. This hot-plug capability enables you to add,
remove, or replace a PCI card on a powered-on system, while the rest of the system’s
capabilities remain unaffected.
Hot-plugging significantly reduces system downtime associated with PCI card
replacement. However, the hot-plug procedure involves issuing software commands
for preparing the system before removing a PCI card and for reconfiguring the
operating system after installation of a new card. The Sun Fire V890 internal disk
drives are also hot-pluggable components.
In contrast, Sun Fire V890 fan trays and power supplies are hot-swappable. You can
remove or insert these components at any time without any prior software
preparation. For more information about hot-pluggable and hot-swappable system
components, refer to the Sun Fire V890 Server Owner’s Guide.
Note – The Sun Fire V890 system controller (SC) card is not a hot-pluggable
component. Before installing or removing an SC card, you must power off the
system and disconnect all system power cords.
About Hot-Plug Operations and
Dynamic Reconfiguration
Hot-plug operations for PCI cards involve Dynamic Reconfiguration (DR). Dynamic
Reconfiguration is an operating system feature that enables you to reconfigure
system hardware while the system is running. Using DR, you can add or replace
hardware resources with little or no interruption tonormal system operations.
PCI hot-plug procedures may involve software commands for preparing the system
prior to removing a device, and for reconfiguring the operating system after
installing a new device. In addition, certain other system requirements must be met
in order for hot-plug operations to succeed. For details, see
“About Dynamic
Reconfiguration Requirements” on page 4.
For detailed PCI hot-plug procedures, see Chapter 2.
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