How to pinpoint ESXi hardware devices with vmkchdev

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If you have ever had trouble identifying specific hardware devices (NIC’s, Storage Adapters, Disks, etc.) on the vSphere compatibly guide the following command is for you! As I’m sure you know, there can be multiple device descriptions listed on the VCG and it can be confusing to know which device matches the device you have. When this happens, it is necessary to locate the following ID’s:

  • VID = Vendor Id
  • DID = Device Id
  • SVID = Sub-Vendor Id
  • SSID = Sub-Device Id (aka Max SSID)

These IDs enable users to pinpoint the device without question and help to ensure you have the correct hardware guidance. VMware’s guidance to pinpoint devices is outlined in KB1021534 This KB is very helpful and its where I found my new favorite command. With this one command it will produce nearly all the IDs in one shot vs. multiple commands.

vmkchdev -l << that is -l as in lama

In this example, I am looking to identify vmhba1.

I simply input the ID numbers into the VGC and it pinpoints the product, NO more guessing.

 

Summary – By using this simple command and the vendor ID you’ll be sure you are identifying your hardware devices properly.

 

If you like my ‘no-nonsense’ blog articles that get straight to the point… then post a comment or let me know… Else, I’ll start writing boring blog content.

 

 

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