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PowerEdge: How to Determine the BUS Speed of a PCI-e Card in Red Hat Linux

Summary: This article provides information about how to determine the PCI-E bus speed of a PCI-E card in Red Hat Enterprise Linux (RHEL)

This article applies to This article does not apply to This article is not tied to any specific product. Not all product versions are identified in this article.
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Instructions

Note: The following commands should be native to the Linux OS and could be run from anywhere. The commands are case-sensitive. You may have to follow the commands with "> filename.txt" to output the text to a file for review. For Example: lspci > filename.txt

  1.   First lets figure out what the bus address of the device in question is by running the command:  lspci
    SLN249067_en_US__11308956087063.lspci
     
  2. We can see an LSI RAID controller however the controller is not a raid controller so that is the incorrect device. The only other LSI device is listed as having a bus address "04:00.0"
    Note: We can also see other devices like an Intel 82599EB 10 GB NIC listed. You can see both ports on this dual port NIC using its LUN ID of .0 or .1
  3. At this point we have two options:
    Run command lspci -nv and search within it for our bus address, in this case "04:00.0"
    SLN249067_en_US__21308956129330.lspci -nv

     

    Note: We can see the "LnkCap" with a "Width x8" and a "LnkSta" with a "Width x8" from this we can see that the device has a negotiated speed of 8x.
  4. Or we could run command dmidecode and search within it for our bus address, in this case "04:00.0"
    SLN249067_en_US__31308956152721.dmidecode
     
    Note: We can see under "Designation" that the slot type accepts x16,x8, or x4. From the "Type" we can see the length of the slot as being x16.

Affected Products

Red Hat Enterprise Linux Version 7

Products

SUSE Linux Enterprise Server 12, PowerEdge M640, PowerEdge M640 (for PE VRTX), PowerEdge MX5016s, PowerEdge MX740C, PowerEdge MX750c, PowerEdge MX760c, PowerEdge MX840C, PowerEdge R240, PowerEdge R250, PowerEdge R260, PowerEdge R340, PowerEdge R350 , PowerEdge R360, PowerEdge R440, PowerEdge R450, PowerEdge R540, PowerEdge R550, PowerEdge R640, PowerEdge R6415, PowerEdge R650, PowerEdge R650xs, PowerEdge R6515, PowerEdge R6525, PowerEdge R660, PowerEdge R660xs, PowerEdge R6615, PowerEdge R6625, PowerEdge R670, PowerEdge R740, PowerEdge R740XD, PowerEdge R740XD2, PowerEdge R7415, PowerEdge R7425, PowerEdge R750, PowerEdge R750XA, PowerEdge R750xs, PowerEdge R7515, PowerEdge R7525, PowerEdge R760, PowerEdge R760XA, PowerEdge R760xd2, PowerEdge R760xs, PowerEdge R7615, PowerEdge R7625, PowerEdge R770, PowerEdge R840, PowerEdge R860, PowerEdge R940, PowerEdge R940xa, PowerEdge R960, PowerEdge T150, PowerEdge T160, PowerEdge T340, PowerEdge T350, PowerEdge T360, PowerEdge T440, PowerEdge T550, PowerEdge T560, PowerEdge T640, PowerEdge XE2420, PowerEdge XE7420, PowerEdge XE7440, PowerEdge XE8545, PowerEdge XE8640, PowerEdge XE9640, PowerEdge XE9680, Red Hat Enterprise Linux Version 9, Red Hat Enterprise Linux Version 8, SUSE Linux Enterprise Server 15 ...
Article Properties
Article Number: 000175770
Article Type: How To
Last Modified: 09 Nov 2024
Version:  5
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