Once the installation of the vSphere is completed I got the following error on the console.
While loading its shows "Failed to load iommu driver"
cpu1:....: Initialization for vtd failed with -1"
To fix this disable the VT for Direct I/O from the BIOS
1) Reboot the esx host, press F12 and go to BIOS
disable "Virtualization support --VT for Direct I/O"
save and reboot
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