Sun Microsystems 5500, Справочное руководство

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Chapter 3 CPU/ Boards and Components 3-5
The hot-plug feature enables you to insert a new board into a powered-on system,
despite the system being “live,” or being supplied with electrical power. When the
hot-plug feature is used to add a board to a powered-on system, the system will not
use the new board until the system is rebooted.
3.4 CPU/ Boards
Each CPU/ board supports up to two UltraSPARC II modules and 16
SIMM slots for memory.
The CPU/ board includes an Address Controller (AC+), 8 bit-sliced Data
Controllers (DC+s), a Bootbus Controller, onboard devices (including a Flash PROM,
and SRAM), two CPU processor slots, and slots for two memory banks of 8 SIMMs
each.
3.4.1 Removing a Board
3.4.1.1 Removing a Board from a Powered-On System
Caution –
Remove a board from a powered-on system only after the ASR software
has disabled the board. If a board has not been disabled by the ASR software, then
the operating system should be halted and the system powered off prior to board
removal. See Chapter 11 “Powering Off and On” and then see Section 3.4.1.2
“Removing a Board From a Powered-Off System.”
1. Ensure that the board has been disabled by the ASR software. See Section 3.3
“Hot-Plug Feature.”
There are two possible results:
■
The three LEDs on the board are not lit (board has no power).
■
The outer two green LEDs are not lit and the middle yellow LED is lit (board in
low power mode).
2. Use a Phillips #1 screwdriver to unlock the board.
Insert the screwdriver into each quarter-turn access slot (the slots are on the left and
right sides of the board) and turn the arrow to the unlocked position (
FIGURE 3-3
).