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11–Troubleshooting Guidelines
Caveats
NE0154601-00 C 11-5
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.
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.
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