Q-Logic 3000 PCI Express Slot, QLogic Adapter Device IDs, You should see a message similar to

11–Troubleshooting Guidelines Caveats

PCI Express Slot

The QLogic adapter can be located on the PCI Express bus using the following Linux procedures.

Determine the vendor and device ID. To check if the PCIe slot has a x8 link for optimal PCIe performance, first determine the PCI vendor ID and device ID code by typing the following command:

% lspci -n

You should see a message similar to:

06:00.0 0200: 4040:0100 (rev 42)

The QLogic vendor ID is 0x4040. A list of QLogic adapter device IDs is listed in Table 11-3.

Table 11-3. QLogic Adapter Device IDs

Product	Device ID	Description
QLE3044	0124	Quad-port 1GbE copper interface
QLE3142-CU	0126	Dual-port 10GbE with twinax interface
QLE3142-SR	0126	Dual-port 10GbE with short-range fiber interface
QLE3142-LR	0126	Dual-port 10GbE with long-range fiber interface

Determine the interface attributes. To determine the attributes of the interface, type the following command:

% lspci -n -d 4040:0100 -vvv grep -i width

You should see a message similar to:

Link: Supported Speed 2.5 Gb/s, Width x8, ASPM L0s, Port 0

Link: Speed 2.5Gb/s, Width x8

Determine the width parameters. Check if the lspci output “negotiated width” (the second width in the output) reflects the actual “supported width”. In an system with a QLE3044, for example, type the following command to determine if these two widths are the same:

% lspci -xxx -vvv -d 4040:0100

In the previous command, 4040 indicates the QLogic vendor ID and 0124 indicates a QLE3044. The device ID is 0126.

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