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MY VM WONT BOOT AFTER SWITCHING IT TO UEFI. JUST NO BOOTABLE DEVICE

Solvedbootvirtualizationvm5 replies · 143 views · started
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Accepted solution by Amara Koch — yeahhh if the bootloader itself is damaged after a conversion, boot the VM from the OS install ISO. For Windows, use teh recovery command…
  1. Jonas Moreau
    @proxybuilder-3q0

    hmmmm ok learning VMware ESXi in my home lab. after switcihng it to UEFI, my Windows VM shows this instead of teh login screen:

    Reboot and Select proper Boot device

    Reboot and Select proper Boot device
or Insert Boot Media in selected Boot device and press a key

No bootable device -- insert boot disk and press any key

    i tried attaching teh disk again, no change. is teh disk corrupt?

    This is just a lab, sooo nohting is on fire, but I wanna understand what I did wrong 😭 I clicked through teh wizard with mostly default settings. Which setting usually cauess this when moving a disk around in VMware ESXi? im about to throw this thing out the window lol

    1
  2. Tomas Novak
    @tomas_socket

    Is the guest disk MBR or GPT, and is the VM set to BIOS or UEFI (Gen 1 or Gen 2 on Hyper-V)? ??

    5 5 helpful
  4. Idris G.
    @idrisg732
    in reply to @proxybuilder-3q0

    oof if Secure Boot is on for a Linux guest in Hyper-V Gen 2, pick teh Microsoft UEFI Certificate Authority template or disable Secure Boot 😭 With the wrong template the VM falls through to No operating sysetm was loaded. worked for me anyway 🤷

    2 2 helpful
  5. Amara Koch
    @amara.koch
    Accepted solution

    yeahhh if the bootloader itself is damaged after a conversion, boot the VM from the OS install ISO. For Windows, use teh recovery command prompt and bcdboot C:\Windows (with the correct drive letter) to rebuild boot files xD for Linux, chroot and reinstall GRUB.

    26 5 helpful

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