Intel® Server Board Set SE8500HW4 Memory Board | Intel® Server Board Set SE8500HW4 |
4.5.1Button, Retention Latch and LEDs
The following sections provide an overview of the hardware required to support memory hot plug. See Section 10.1 for more information about memory hot plug support on the Intel® Server Board Set SE8500HW4.
4.5.1.1Attention Button
This is a user accessible push button that initiates the proper shut down of the Memory Board during a memory hot plug event. When pushed, a notification is sent to the memory hot plug controller on the Mainboard. The system blinks the attention LED until the request can be serviced. The BIOS interprets the request as a hot removal if the Memory Board is included in the current system memory configuration or as a hot add if it is not.
If the system rejects the removal request, the power LED remains lit. A removal request may be rejected if the current memory mode does not support hot removal. For example if only three good boards in a memory RAID mode remain, the system will reject a removal request to any of those three boards. If the system accepts the removal request it blinks the power LED, de- initializes the board, then turns off the power LED. After the power LED is turned off, the user may open the retention latch to remove the Memory Board.
4.5.1.2Retention Latch
The retention latch is a mechanical lock and handle used to remove the Memory Board from a chassis and the Mainboard. In the event of an unexpected memory hot plug operation, non- accessible buttons under the retention latch will turn off power to the Memory Board. This safety feature is included to protect the user and circuits in the event that the attention button was not used properly.
24 | Revision 1.0 |
| Intel order number |