Grub legacy/grub4dos boot Win10/UEFI ESP partition

title Boot Win10/UEFI bootmgr 
find --set-root /bootmgr
chainloader /bootmgr
 

 

Note: UEFI Boot   (ESP partition)

BIOS related/1st boot program


EFI\Boot\bootx64.efi  

For microsoft only/2nd boot 


EFI\Microsoft\Boot\bcd
EFI\Microsoft\Boot\bootmgr.efi
EFI\Microsoft\Boot\bootmgfw.efi
\bootmgr


For Ubuntu only/2nd boot   (Single Boot)


ubuntu\grubx64.efi

 

 

For Ubuntu only/2nd boot   (Dual Boot)

EFI\ubuntu\grubx64.efi

Same level 

EFI\Microsoft\

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