Welcome to Running-System!

My name is Andreas Lesslhumer and I live near Wels, Austria. Currently I am working for the IT subsidiary of an Austrian banking group.

This blog was set up as a personal knowledge base, to write down solutions for all the little problems I had to deal with in my everyday work. Over time, more and more visitors made their way to the site – currently (as of 2015) more than 25.000 unique visitors every month.

The main focus of this blog is on virtualization (mostly with products of VMware), troubleshooting, how-to’s, backup, security,…

Lesslhumer AndreasYou can find more information about me here XING, Linkedin or here at the VMware VMTN Blog.

To write me a mail use office[at]lessi.net or follow me on twitter: @lessi001

The views expressed anywhere on this site are strictly mine and not the opinions and views of my employer.





  1. gustavo

    Nice lab. I am also trying to setup nested esxi inside esxi.

    My server is running an Intel Xeon Processor E5540. P Proliant DL380 G6 2x Xeon Quad-Core 2.53GHz
    Bios settings
    – Intel(R) Hyperthreading Options -> enabled
    – Intel(R) Turbo Boost Technology -> enabled
    – Intel(R) VT-d -> enabled

    My server does not support VT-x/EPT.

    Can I still setup nested esxi inside nested ESXI?
    I keep getting an error in my management vm

  2. Alexa Schlosser

    Hello Andreas,

    I am the editor of VMUG’s monthly e-newsletter, VMUG Voice. Manfred Hofer suggested you as a good candidate for the “Featured Blogger” section of our e-newsletter. Is this something you would be interested in? If so, please email me at aschlosser@vmug.com.


  3. James Hakim

    Hi there,

    We’re interested in buying some ad space on your site, I have several advertisers interested in this niche.

    Would be great to get you listed on PublicityClerks.com with an ad spot for sale, let me know if interested 🙂


  4. Ondrej

    Hi, your linkedin link does not work 🙂

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