After Upgrade, Can't Boot to USB

[stepmback]

I pulled the plug and upgraded my Unraid Hardware. I followed the steps (hopefully correct) by space invader. I have a new MB, CPU, RAM in the box. I can get it to the BIOS and under the Boot Options I have it set to USB. I see "UEFI: Samsung Flash Drive FIT 1100, Partition 1" listed as the first item (only item) to boot. But it won't boot to it. I even went into Boot Menu on start-up and can select the USB drive and see it. But it does not do anything. I am not sure if it the USB flash-drive that is the issue or my motherboard. I suspect it is the flash drive.

 

Help!!

[stepmback]

I found the answer. I wish I had seen it before. This worked.

 

In the BIOS boot order is your flash drive called UEFI:{brand of flash drive} or something similar?

 

Some recent ASRock (and other brands as well) boards will only boot UEFI and not legacy.  On your flash drive, if there is a folder named EFI- that means it wants to boot in legacy mode.  To tell it to boot UEFI, rename the folder to EFI (remove the trailing - character).

Edited October 1, 2022 by Hoopster