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VMware ESXi 3.5 - 6.0 Hypervisor Size Comparison

The first public release of VMwares bare-metal hypervisor ESXi was about 7 years ago. During that time we had lots of new features, including the latest outstanding introduction in vSphere 6.0 - Virtual Volumes. This post takes a look at how the hypervisor footprint has changed since ESXi 3.5.

  • ESXi 3.5 - 46,01 MB
  • ESXi 4.0 - 59,99 MB
  • ESXi 4.1 - 85,19 MB
  • ESXi 5.0 - 132,75 MB
  • ESXi 5.1 - 125,85 MB
  • ESXi 5.5 - 151,98 MB
  • ESXi 6.0 - 154,90 MB


Read More »VMware ESXi 3.5 - 6.0 Hypervisor Size Comparison

ESXi 6.0 Image for Intel NUC

ESXi 6.0 requires a little tweak to run without problems on an Intel NUC. This post explains how to create a customized ESXi 6 ISO for your 4th and 5th gen. Intel NUC. The images can be used to do a fresh install or upgrade a NUC to VMware ESXi 6.0.esxi-on-5th-gen-NUC5i3MYHE

The Image works for the following NUCs:

  • Intel NUC D54250WYK
  • Intel NUC D34010WYK
  • Intel NUC D54250WYKH
  • Intel NUC D34010WYKH
  • Intel NUC5i7RYH
  • Intel NUC5i5RYH
  • Intel NUC5i5MYHE
  • Intel NUC5i5RYK
  • Intel NUC5i3RYH
  • Intel NUC5i3MYHE
  • Intel NUC5i3RYK

Read More »ESXi 6.0 Image for Intel NUC

VMware ESXi 6.0 - Unsupported Hardware

hcl-60Double check your vendor support when updating ESXi hosts from VMware vSphere 5.5 to 6.0. There are a lot of systems that are no longer supported. The following servers were supported in 5.5 but are according to the VMware HCL no longer supported in vSphere 6.0.

Your server is listed and you want to upgrade? Don't panic.

  • Usually, the list gets smaller a couple of weeks after a new vSphere version has been released. I will update this post when I notice changes.
  • Not supported does not mean that it does not work.
  • Servers get certified by their vendor, not VMware. If you want a server to get certified, ask your vendor.
  • Vendor support matrices and VMware HCL have some mismatches at the moment (HP and IBM). Servers are listed at the bottom. Please ask your vendor or VMware if you are allowed to upgrade.
  • Did I miss something? Please comment.

Last Update: May 2, 2018

Read More »VMware ESXi 6.0 - Unsupported Hardware

Free ESXi 6.0 - How to Download and get License Keys

vSphere 6.0 has been released and VMware provides a free version of their Hypervisor ESXi for everyone again. The license key can be created for free at VMwares website. It has no expiration date. The binaries you will receive as "Free Hypervisor" are 100% identical to the paid version.


  • No support
  • Free ESXi cannot be added to a vCenter Server
  • 2 physical CPUs
  • Unlimited cores per CPU
  • Unlimited physical Memory
  • max. 8 vCPU per VM

Read More »Free ESXi 6.0 - How to Download and get License Keys

ESXi 6.0 - ESXCLI Command Mindmap

In vSphere 6.0 the command line interface esxcli has 2 new namespaces. The esxcli is a complete set of commands that you can use for troubleshooting, configuration or kickstart files. I have created and printed a mindmap to navigate through the namespaces more quickly. This post covers only basic namespaces, available on all ESXi 6.0 hosts. If you've installed additional software you might see more namespaces. I've also created a mindmap for ESXi 5.1 and ESXi 5.5.

ESXCLI in version 6.0 has 15 namespaces:Read More »ESXi 6.0 - ESXCLI Command Mindmap

How to kill an Unresponsive VM (ESXi 5.x)

When a Virtual Machine crashed it might happen that you cannot power it off with the vSphere Client. In that case, you have to kill the VM through the ESXi command-line.

Connect to the ESXi host with SSH. (If a virtual machine crashed in a cluster and you cannot identify where it is running, you have to identify the ESXi Hosts where the VM is running)

Locate the World ID with esxcli vm process list or vmdumper -lRead More »How to kill an Unresponsive VM (ESXi 5.x)