Disabled System Board

A system board can be disabled (not used by the operating system) in three ways:

• A self-test detects a failure and disables the board.

• The board is disabled manually by using disabled-board-list. For example:

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  ok setenv disabled-board-list 72
  

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The above command disables boards in slots 7 and 2. See Table 1-1 for more information.

• The board was inserted while the operating system was running.

To Swap Out a Disabled Board

1. Verify that system precharge is OK.

   Use the prtdiag command. For more information see "System Configuration and Diagnostic Information".

2. Verify that hot-plug is available.

3. Make sure that the board is disabled (not in use by the operating system and the power light on the target board is off).

4. Remove the disabled board.

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   Caution -

   If the yellow light is lit on the front panel, use prtdiag to determine the cause before installing a new board.

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5. Install a new board.

6. To activate the board:

   • For PCI boards, reboot the system.

   • For other I/O boards, use DR commands.