vSphere 6.0 Performance Metrics – What is CPU Readiness?

I haven’t seen this in any announcement, but there is a new performance metric in vSphere 6.0 called CPU Readiness which is according to the description:

Percent of time the virtual machine is unable to run because it is contending for access to the physical CPU(s).


Read more »

ESXi 5.1 March 2015 Patch (Build 2583090)

VMware has published a patch for ESXi 5.1.

Product: VMware ESXi 5.1
Release date: March 26, 2015
Patch: ESXi510-201503001
Build: 2583090
Build (security only): 2575044
Links: KB2099286 | Download

The update resolves 44 issues including the following: Read more »

vSphere 6.0 – Unsupported Storage Arrays

The list of unsupported servers since ESXi 6.0 was long. What about the storage landscape? The following storage arrays were supported in 5.5 but are according to VMware HCL no longer supported in vSphere 6.0.

  • EMC VPLEX Virtual Edition
  • EMC AX4-5
  • EMC AX4-5i
  • EMC Celerra CNS
  • EMC Celerra NS-120
  • EMC Celerra NS-480
  • EMC Celerra NS-960
  • EMC Celerra NX4
  • EMC CLARiiON CX4-120
  • EMC CLARiiON CX4-120 C8
  • EMC CLARiiON CX4-120 C8X
  • EMC CLARiiON CX4-240
  • EMC CLARiiON CX4-240 C8
  • EMC CLARiiON CX4-240 C8X
  • EMC CLARiiON CX4-480
  • EMC CLARiiON CX4-480 C8
  • EMC CLARiiON CX4-480 C8X
  • EMC CLARiiON CX4-960
  • EMC CLARiiON CX4-960 C8
  • EMC CLARiiON CX4-960 C8X

Please note that this is only a diff between 5.5 and 6.0. There was a huge drop in storage support between 5.1. and 5.5!

Source: VMware HCL

vSphere 6.0 GA – vSphere Client back, or not?

One of the worst parts of the vSphere 6 Beta was definitely this error message:

VMware promised to give it back in the GA release:

“vSphere C# Client beta builds had only host client functionality enabled. With the GA build, you can use the vSphere C# Client to connect to vCenter to do all activities just the way you would have done with previous releases. However, all new features from vSphere 5.1 onwards are available only in vSphere web client.”

But is it really back? Read more »

VMware vCenter Server Appliance 6.0 Guided Installer Walkthrough

The vCenter Server Appliance (vCSA) does now have a guided installer. It is no longe available as .ova or .ovf. The deployment of vCSA is now done by mounting an ISO and configure vCSA with a browser. Read more »

vSphere 6.0 – How to use ESXCLI Commands in PowerCLI

PowerCLI, a set of PowerShell extensions for vSphere, is a great tool for automating VMware configuration and management tasks. It allows you to change a lot of ESXi host and vCenter settings. One powerful cmdlet is Get-EsxCli which allows you to run ESXCLI tasks from your PowerCLI console. ESXCLI is the main configuration command on an ESXi host. This post explains how to use the Get-EsxCli cmdlet.


Read more »

How to fix ESXi on Intel NUC malformed Manufacturer and Model

VMware ESXi 5.x and 6.0 installed on a 5th gen Intel NUC (NUC5i7RYH, NUC5i5RYH, NUC5i5MYHE, NUC5i5RYK, NUC5i3RYH, NUC5i3MYHE and NUC5i3RYK) has a problem with SMBios system information.

  • Manufacturer and Model in the vSphere Client is displayed with replacement characters (� black diamond with a white question mark).
  • Adding host to a vCenter Server fails with the following error message

    A general system error occurred: at line number 7, not well-formed (invalid token)

To solve this problem you have to replace the BIOS. This post explains how to create a customized BIOS with changed SMBios variables and install it on your NUC.

Read more »

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 »

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. Pleask ask your vendor or VMware if you are allowed to upgrade.
  • Did I miss something? Please comment.

Last Update: March 20, 2015

Read more »

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 »