With release of vSphere 6.7 many enhancement to existing features and new features came. One of the efficient feature vSphere Quick Boot is available and I will be discussing about this feature in this post.

vSphere Quick Boot is an innovation by VMware and this feature helps on restarting the ESXi hypervisor without rebooting underlying  physical host . Quick Boot eliminates the time-consuming device initialization and self-testing procedures shortening the time. Not only the reboot , Quick Boot supports patching and upgrades of vSphere hosts through vSphere Update Manager.

This functionality is only available for hosts that are running ESXi 6.7 with compatible Hardware .Even if your hardware is compatible with Quick Boot and you are running a legacy version of ESXi, this feature will not be available. If the system is incompatible with vSphere 6.7 Quick Boot, it will perform a regular reboot.

 Supported Hardware Platforms

Currently Dell and HP are the OEM hardware vendors supports this feature and you can find the supported servers details on below links

With vSphere 6.7 a built in script available to test the hardware compatibility with ESXi Quick Boot.

Script Path – /usr/lib/vmware/loadesx/bin/loadESXCheckCompat.py

Detailed Information available on VMware KB

Verify the Host Compatibility

Login to ESXi as root from putty or Console

Verify the ESXi version and run the script

Configure vSphere Quick Boot 

Configuring VMware ESXi 6.7 Quick Boot functionality must be done through VMware Flex client and Upgrades or Patching Can be done though HTML Client

Navigate to Home > Update Manager

Select the vCenter Server and navigate to Manage – >  Host/Cluster Settings

You can see Quick Boot is not enabled , Click on Edit button go to configuration option.

Select the Enable Quick Boot option by adding Tick on the box and Click OK

After Enabling  , Verify the Quick Boot Status  .








The Update Manager UI will present Quick Boot as an option for servers that support the feature, however for some servers this option will not be available and your host will perform regular reboot rather than a Quick Boot.

You may see this issue if:

  • Host platform is not supported.
  • Host is configured to use a TPM.
  • passthru devices configured for VMs on your host.
  • vmklinux drivers loaded on your host.
  • Other non-certified drivers loaded on your host
  • Quick Boot is disabled in the Update Manager UI.

More vSphere 6.7 Posts

Refer VMware Documentation for More details .