Table 38. Pci Express* Hot-Plug Led Function Table - Intel SE7520AF2 Technical Product Specification

Intel® Server Board SE7520AF2 TPS
3.3.8.3.2 PCI Hot-Plug Usage Model
This section describes the hot-plug usage model for both the PCI Express* and PCI-X slots.
Each of the four hot-plug slots has a set of status LEDs (for power and attention). The PCI hot
plug GUI is used to invoke a hot-plug sequence to remove or add or replace an adapter via a
software interface. The status LEDs consist of a green power LED and an amber attention LED.
Power LED All main voltage and data
rails are removed from slot.
PCI adapter may be added
or removed
Attention LED Normal operation
5.5.8.4 Hot Removal Procedure
Open the chassis cover to see the status LEDs and to access the PCI cards.
Click "Remove," then "Confirm" in the PCI hot plug GUI. The operating system safely
stops any threads that are dependent on the device, flushes any buffers communicating
with the device, and removes device drivers specific for the device. After this, the
operating system invokes the appropriate BIOS ACPI method to power off the slot and
turn off the power LED.
Wait for power LED to turn off
Remove the adapter.
5.5.8.5 Hot Insertion Procedure
Open the chassis cover to see the status LEDs and to access the PCI cards.
Ensure the power LED on desired slot is off.
Install the adapter.
Click "Hot Add" button for that particular slot in the PCI hot plug GUI.
Confirm the operation by clicking the "Confirm" control button. The GUI generates an
interrupt, which is handled by the BIOS ACPI code. The interrupt handler checks the
frequency and mode of the bus and card, and powers on the slot.
Wait for power LED to turn on. If the attention LED continues to blink, a power fault may
have occurred. In this case, remove the adapter, wait for the LED to turn off, and repeat
the hot insertion process. A lit attention LED can also indicate a bus/card capability
mismatch. In this case, this card cannot be hot inserted into this slot.
When a new card is added to the slot, the ACPI BIOS checks the frequency and mode of the
corresponding PCI/PCI-X bus and the capabilities of the adapter card. The ACPI BIOS attempts
to match the bus mode and frequency to the maximum capabilities of the card by
reprogramming and resetting that individual bus.
Revision 1.2

Table 38. PCI Express* Hot-Plug LED Function Table

Off
Normal power to slot. PCI
adapter may NOT be
added or removed
Slot on attention; power
fault or operational
problem present on the slot
Intel order number C77866-003
On (Solid)
Slot power in transition (on-off or
off-on). PCI adapter may NOT
be added or removed
Slot being identified at the user's
request to locate the slot via the
Hot-Plug Interface Driver
System BIOS
Blinking
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