WilliamLam.com

Video of ESXi install workaround for Fatal CPU mismatch on feature for Intel 12th Gen CPUs and newer

by // 50 Comments

I have been noticing more and more users that have acquired hardware that includes the latest Intel 12th Generation CPU (Alder Lake) and even the newest Intel 13th Generation CPU (Raptor Lake) for use with ESXi. Starting with the Intel 12th Generation CPU, Intel has introduced a new hybrid "big.LITTLE" CPU architecture that integrates two types of CPU cores: Performance-cores (P-cores) and Efficiency-cores (E-cores) into the same physical CPU die.

ESXi is currently not aware of this new consumer architecture and it currently expects all cores within a CPU package to have uniform characteristics. If you boot the ESXi installer, it will PSOD (Purple Screen of Death) by default and you will see a message about "Fatal CPU mismatch on feature" which is due to the different CPU properties across both the P-Cores and E-Cores. However, there is a way to workaround the issue by disabling the CPU uniformity check that ESXi performs as part of its boot up.

UPDATE (01/16/24) - See this blog post on some updated experiments using CPU affinity when both E-Cores and P-Cores are enabled when using ESXi.

UPDATE (04/22/23) - If you decide NOT to disable either E-Cores or P-Cores, you may also run into an additional PSOD when powering on a VM with GP exception in world message. To workaround this problem, please see this blog post HERE.

UPDATE (03/24/23) - It is possible and recommended to actually disable the E-cores within the Intel NUC BIOs following the instructions HERE to prevent ESXi from PSOD'ing due to non-uniform CPU cores rather than applying the ESXi boot option workaround as described in the video below.

I initially wrote about the solution back in Feb of 2022 where this new CPU was first introduced in the Intel NUC line with the Intel NUC 12 Extreme (Dragon Canyon) and subsequently, I had also wrote about the solution reviewing both the Intel NUC 12 Pro (Wall Street Canyon) and the Intel NUC 12 Enthusiast (Serpent Canyon).

While the majority of folks have not had any issues applying the workaround, I have started seeing some folks running into challenges, perhaps its familiarity with ESXi or applying kernel options. In any case, I figured it might help to record a video demonstrating the workaround for those that rather visualize the solution along with the written instructions (included below).

[Read more...]

How to replace some of ESXi Kickstart automation with new configstorecli commands?

by // 2 Comments

I had received a question a couple of weeks back from a customer who was already automating their ESXi installation using ESXi Kickstart, also known as ESXi Scripted Installation but they had ran into an issue when migrating the exact same automation to the latest ESXi 7.0 releases.

The method the customer was using to manage their ESXi password policies, which was by updating the /etc/pam.d/passwd file, no longer function as expected and this was a result of the introduction of the ESXi ConfigStore, which I have written about here.

As mentioned in the article, the goal of the ESXi ConfigStore is the following:

The goal of the ConfigStore, initially introduced in ESXi 7.0 Update 1, is to centrally manage all configurations for an ESXi host instead of relying on different methods including a variety of configuration files.

[Read more...]

ESXi on AMD ChangWang CW56-58

by // 40 Comments

It can be pretty difficult to find an AMD-based small form factor (SFF) kit that is compatible with recent ESXi releases. The large majority of these AMD SFF kits all use Realtek for their onboard network adaptor and Realtek does not have a driver for ESXi, nor have they expressed any interests in creating one.

This is also quite unfortunate, as there have been some pretty interesting AMD kits that have been released in the market, but they can not be fully utilized due to the network driver challenges. Prior to the holiday break, fellow VMware colleague Hilko Lantinga, who works in our End User Computing (EUC) division had reached out about a new AMD kit that he had just acquired and has been very happy with after putting it through its paces, especially from a power efficiency standpoint for his updated VMware Homelab.

The system is from a vendor called ChangWang, which I was not familiar with and the AMD kit is the CW56-58, which is based on an AMD Zen 3 architecture (7nm) and what stands out immediately is that this system includes four built-in network adaptors (hint: they are all compatible with latest ESXi 8.0 release)! I asked if he would be willing to sharing his thorough review with the community as this could be a really interesting system and below is Hilko's detailed write-up in his own words.


The following content below is a contribution from Hilko Lantinga.

[Read more...]