Archive for the ‘BIOS Configuration’ Category

 Before you install ESX/ESXi don’t forget to enable VT option on the physical server’s BIOS.

  • Restart the server
  • On “Dell” screen, press F2 for entering System Setup


  • Go to Processor Settings > Virtualization Technology , change this parameter into Enabled    




  • While you are on the BIOS page Scroll down on the page > F1/F2 Prompt on Error , change this parameter to Disabled.


  • In order to save the changes press ESC > and save the changes



Idit 🙂


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Enhanced VMotion Compatibility (EVC) simplifies VMotion compatibility issues across CPU generations. EVC automatically configures server CPUs with Intel FlexMigration or AMD-V Extended Migration technologies to be compatible with older servers. After EVC is enabled for a cluster in the VirtualCenter inventory, all hosts in that cluster are configured to present identical CPU features and ensure CPU compatibility for VMotion. The features presented by each host are determined by selecting a predefined EVC baseline. VirtualCenter does not permit the addition of hosts that cannot be automatically configured to be compatible with the EVC baseline.

Hardware Changes

In order to enable VMware EVC we must first change two parameters in the server’s BIOS:

1)      HP DL 380 G5

Please enter the BIOS and change the following:

In order to enter the BIOS please press F9 at startup.

  1. Advanced Options > Processor Options > No-Execute Memory Protection (Enabled)
  2. Advanced Options > Processor Options > Intel Virtualization Technology (Enabled)


2)      IBM x3550

Please enter the BIOS and change the following:

In order to enter the BIOS please press F1 at startup.

  1. Advanced Setup > CPU Options > Execute Disable Bit (Enabled)
  2. Advanced Setup > CPU Options > Intel Virtualization Technology (Enabled)



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