I just finished install Centos Linux western digital nx4000 NAS , this machine came with windows server 2013 , just don’t like it and change it with linux :p , after finish the installation , the linux won’t auto boot , it stuck on startup.nsh. (on EFI) shell. To make this thing works we need create startup.nsh , here the steps , on EFI shells

Shell> fs0:

( I user fs0 because I install linux on USB Drive )

fs0: \> cd EFI\Boot\

fs0: \>edit startup.nsh

On editor just add one line “FALLBACK.EFI”

Reboot the machine to test it :)