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Upgrading ESXi

  • 1.  Upgrading ESXi

    Posted Aug 16, 2021 06:34 PM


    I have ESXI v7.0.0 install and have been using it for over a year.  It is connected to VSphere Center.  I have been able to patch vCenter using the Appliance Manager to  I now need to patch ESXi.

    FYI, vCenter is a VM on the ESXi host.

    I tried using vCenter to patch the ESXi Host and when I remediate I get the attached issue.  I don't know how to fix this since vCenter is installed on the host.  If I shutdown vCenter then I won't be able to patch ESXi.

    Please help!



  • 2.  RE: Upgrading ESXi

    Posted Aug 17, 2021 09:55 AM


    you can upgrade your ESXi host from DCUI mode.

    Mount the the esxi ISO  on the Virtual CD of the idrac and perform an "Upgrade ESXi, preserve VMFS Datastore" 


    And go on.


    Your vCenter Server must be on the same version of esxi 



  • 3.  RE: Upgrading ESXi

    Posted Aug 22, 2021 03:46 PM

    So I have to have the most current version of ESXi on an ISO then?

  • 4.  RE: Upgrading ESXi

    Posted Aug 22, 2021 04:06 PM


    I was able to get the latest ESXi iso.  Unfortunately, I am fairly new to this.  How do I mount the ISO on the Host?  I know how to do this on a VM but I can't seem to find it on the host?

  • 5.  RE: Upgrading ESXi

    Posted Aug 22, 2021 05:00 PM

    A few questions:

    1. On what hardware (vendor/model) do you have ESXi installed?
    2. Did you download the vendor customized ESXi image (if applicable)?
    3. Do you have any additional drivers/tools installed on the ESXi host?
    4. Does the host offer remote management, e.g. Dell iDRAC, or HPE ilO, and is it licensed for for advanced features like virtual media?

    As an alternative to using the ISO image (or a CD-ROM) you can also use an Offline Bundle (.zip) file to update/patch the host from the command line.

    As a side note. Consider to update the host's firmware too.



  • 6.  RE: Upgrading ESXi

    Posted Aug 22, 2021 06:09 PM

    Hi Andre,

    I built the server myself.  I am a software developer and use the VMs to support my clients.

    I installed vSphere 7 Enterprise Plus.  So, vCenter is running and controlling ESXi.

    vCenter is running v7.02 ( I was able to upgrade vCenter from v7.0.0)

    ESXi is running v 7.00

    So, I need to know what to do now to patch ESXi.



  • 7.  RE: Upgrading ESXi

    Posted Aug 22, 2021 06:23 PM

    Assuming that the latest ESXi version supports your hardware, you may either burn a CD-ROM from the ISO image that you've downloaded, and boot the ESXi host from that CD-ROM. This will let you choose whether to re-install or upgrade ESXi (see 's reply).

    Other than this you may download the Offline Bundle (.zip file), and update/patch ESXi by running a couple of commands from the command line.


  • 8.  RE: Upgrading ESXi

    Posted Aug 23, 2021 07:55 AM

    You can burn your ESXi ISO as indicated by   or from idrac or ilo of your server... you must open the virtual console (of idrac or ilo) and attach the virtual cd, then browse to your iso and mount it (you have to do as when you first installed esxi)

    then reboot the esxi and boot from cdrom.


    PS: verify that your hatdware is in matrix with the latest version of esxi

  • 9.  RE: Upgrading ESXi

    Posted Aug 24, 2021 02:39 PM

    Unfortunately, I am new to ESXi.  Is there anyway you can provide detailed instructions on how to do each step?

    Thanks in advance,


  • 10.  RE: Upgrading ESXi

    Posted Aug 24, 2021 02:43 PM

    What's interesting here is that I can update vCenter very easily, but updating ESXi not straightforward and requires a linux knowledge.  Why is it so difficult?

  • 11.  RE: Upgrading ESXi

    Posted Aug 24, 2021 02:51 PM

    don't worry

    paste me the model of node... is it a dell, a hp or other? tell me the model and i'll try to write a walkthrough... it's no more hard... 

  • 12.  RE: Upgrading ESXi

    Posted Aug 24, 2021 02:55 PM

    Hi Riccardo,

    Its a server that I built. I am a software developer and I use it setup clone servers for my testing my clients software.



  • 13.  RE: Upgrading ESXi

    Posted Aug 24, 2021 03:00 PM

    you can burn the esxi iso on a usb key or burn on cd and boot the server from the device... 


    on the usb key, i think that you can use unetboot in for to have a bootable usb