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What is UEFI?
UEFI stands for Unified Extensible Firmware Interface. The UEFI specification defines a new model for the interface between operating systems and platform firmware. UEFI is designed to replace BIOS(Basic Input / Output System) firmware interface.
Advantages of choosing a UEFI boot mode installation includes the following:
VMware ESXi support for UEFI:
VMware supports installing / booting ESXi hosts in UEFI boot mode from ESXi 5.0 onwards. There is no support available in VMware ESX/ESXi 4.0.x/4.1.x branch for UEFI. Refer to VMware KB which talks about best practices while using ESXi in UEFI mode.
Dell Support for UEFI on PowerEdge servers:
Dell supports UEFI from 11th generation of PowerEdge servers onwards. For a list of PowerEdge servers based on different generations, refer to wiki.
To toggle the boot mode from BIOS to UEFI and vice versa on Dell PowerEdge servers, Press F2 key (System Setup) --> Select System BIOS --> Go to Boot Settings --> Select BIOS if you want to boot the system in BIOS boot mode and select UEFI if you want to boot the system in UEFI boot mode.
To buy a Dell PowerEdge Server factory installed with VMware ESXi system with UEFI boot mode: