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ESXi 7 and 8 Installation fails with "Fatal CPU mismatch on feature"

When you try to install ESXi 7.0 or 8.0 on a system with a 12th Gen Intel CPU, the installation fails with a purple diagnostics screen:

HW feature incompatibility detected; cannot start

Fatal CPU mismatch on feature "Hyperthreads per core"
Fatal CPU mismatch on feature "Cores per package"
Fatal CPU mismatch on feature "Cores per die"

This problem is caused by the new architecture of Intel CPUs which are equipped with different types of cores - Performance-cores and Efficient-cores. With vSphere 7.0 Update 2, the kernel parameter cpuUniformityHardCheckPanic has been implemented to address the issue. This article explains the manual and automated methods to properly implement the kernel option.

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HP Proliant Gen8 Agentless Management floods ESXi and vCenter Logs

Hewlett-Packard introduced a new component called HP Agentless Management within their Gen8 Series. This feature is extensible though an agent running inside the operating system, in that case the ESXi Host. The package (hp-ams) is included in all customized VMware images provided by HP and the HP ESXi Offline Bundles. Unfortunately this package create some issues caused by excessive local logins. This might pointlessly blow up the database and logfiles. You can check that problem by opening the Event-Log provided by the ESXi Host which is flooded with the following messages:

User root@127.0.0.1 logged in as
User root@ logged out (login time: , number of API invocations: , user agent: )
User root@127.0.0.1 logged in as
User root@ logged out (login time: , number of API invocations: , user agent: )

hp-ams

In this post i am going to show how to workaround this issue and remove the hp-ams from you ESXi Host, and how to build a new image without that package.

Read More »HP Proliant Gen8 Agentless Management floods ESXi and vCenter Logs