How to check PCI-E slot number via BIOS?

1. Purpose:

This FAQ aims to guide users to map BIOS PCI-E configuration to PCI-E physical slot.

2. Audience:

SKY-8132S owners.

3. Steps:

a- Run the following command to confirm whether the OS detects the PCI-E card:

 [root@8132-efi ~]# lspci  -s  0

00:00.0 System peripheral: Intel Corporation Device 09a2 (rev 04)

00:00.1 System peripheral: Intel Corporation Device 09a4 (rev 04)
.
.
.

51:00.0 Ethernet controller: Intel Corporation Ethernet Controller X710 for 10GbE SFP+ (rev 02)

51:00.1 Ethernet controller: Intel Corporation Ethernet Controller X710 for 10GbE SFP+ (rev 02)

51:00.2 Ethernet controller: Intel Corporation Ethernet Controller X710 for 10GbE SFP+ (rev 02)

51:00.3 Ethernet controller: Intel Corporation Ethernet Controller X710 for 10GbE SFP+ (rev 02)

89:00.0 System peripheral: Intel Corporation Device 09a2 (rev 04)

89:00.1 System peripheral: Intel Corporation Device 09a4 (rev 04)

89:00.2 System peripheral: Intel Corporation Device 09a3 (rev 04)

89:00.4 Host bridge: Intel Corporation Device 0998

c2:00.0 System peripheral: Intel Corporation Device 09a2 (rev 04)

b- Then, run the lspci –t or lspci | grep Eth to detect the correct bus number

[root@8132-efi ~]# lspci  -t

-+-[0000:ff]-+-00.0

 |           +-00.1

 |           +-00.2

 .
 .
 .
 +-[0000:50]-+-00.0

 |           +-00.1

 |           +-00.2

 |           +-00.4

 |           +-02.0-[51]--+-00.0

 |           |            +-00.1

 |           |            +-00.2

 |           |            \-00.3

c- Check the current link status setting:

[root@8132-efi ~]# lspci -s 51:00.0 -vvv | grep -i  width

                LnkCap: Port #0, Speed 8GT/s, Width x8, ASPM L1, Exit Latency L1 <16us

                LnkSta: Speed 8GT/s, Width x8, TrErr- Train- SlotClk+ DLActive- BWMgmt- ABWMgmt-

d- Boot in BIOS and select Hardware >> Northbridge >> PCI Express Ports Configuration >> to check your current settings (it should be the same as above):

e- Kindly change the link speed as per below:

f- After applying the changes on the BIOS, you should be able to locate the PCI-E cage on your device by checking the link status speed.

[root@8132-efi ~]# lspci -s 51:00.0 -vvv | grep -i  width

                LnkCap: Port #0, Speed 8GT/s, Width x8, ASPM L1, Exit Latency L1 <16us

                LnkSta: Speed 5GT/s, Width x8, TrErr- Train- SlotClk+ DLActive- BWMgmt- ABWMgmt-

Note: If you have only one PCI-E card, you could play around by swapping it to other slots to confirm the port number.

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