Sun Microsystems Fire 880, Owner'S Manual

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144 Sun Fire 880 Server Owner’s Guide • August 2001
About Hot-Pluggable and
Hot-Swappable Components
Sun Fire 880 systems feature a variety of hot-pluggable and hot-swappable
components.
Hot-pluggable components are components that you can install or
remove while the system is running, without affecting the rest of the system’s
capabilities. However, in many cases, you must prepare the operating system prior
to the hot-plug event by performing certain system administration tasks.
Hot-pluggable components that require no such preparation are called
hot-swappable
components. These components can be removed or inserted at any time without
preparing the operating system in advance. While all hot-swappable components are
hot-pluggable, not every hot-pluggable component is hot-swappable.
Sun Fire 880 hot-pluggable components fall into three basic groups:
■
Fan trays and power supplies
■
Disk drives
■
PCI cards
Each group is discussed in more detail in the sections that follow.
Note –
PCI and disk hot-plug operations are not supported when the system
ok
prompt is displayed. You can only perform these hot-plug operations while the
operating system is running.
Caution – The RSC card is not a hot-pluggable component. Before installing or
removing an RSC card, you must power off the system and disconnect all AC power
cords.
Fan Trays and Power Supplies
Sun Fire 880 fan trays and power supplies are hot-swappable—they can be removed
or inserted at any time without requiring prior software preparations. Keep in mind
that a power supply is not considered hot-swappable unless it is part of an N+1
redundant power configuration—a system configured with the optional third power
supply. Do not remove a power supply from a working system if its removal would
leave the system with fewer than two working power supplies.