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Restored UEFI-based Windows 2008 R2 SP1 cannot be booted in Hyper-V environment

KB ID: 2848
Product: Veeam Agent for Microsoft Windows
Published: 2018-12-24
Last Modified: 2022-08-11
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Challenge

After successfully restoring a UEFI-based machine running Server 2008 R2 SP1 to a Hyper-V host, the VM fails to boot.

User-added image

Cause

The machine fails to boot due to a machine configuration that conflicts with Hyper-V.

  • For Hyper-V guest Virtual Machines, Server 2008 R2 is only support for use with Generation 1.
  • UEFI-based boot is only supported by the virtual machines using Generation 2.

Solution

As Hyper-V only supports Server 2008 R2 running in a Generation 1 VM, and Generation 1 in turn only supports MBR, the only solution to make the restored UEFI-based VM operational is to convert the bootloader from the incompatible UEFI (GPT) to MBR. 

This process is documented in the Solution section of KB2407.

More Information

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