BOOTAA64.EFI走的是bios模式，grubaa64.efi走的是uefi模式
[root@localhost centos]# md5sum grubaa64.efi
dff06670847929df2d469961bca5a275 grubaa64.efi
[root@localhost centos]# md5sum shimaa64.efi
cc3db9064ce9ccb8f7301efd39f5ca1c shimaa64.efi
openeuler上面这两个文件md5sum一致哦
[euleros@beih BOOT]$ md5sum BOOTAA64.EFI
c913e10bd4b0d99ce4be5aed16067ec0 BOOTAA64.EFI
[euleros@beih openEuler]$ md5sum grubaa64.efi
c913e10bd4b0d99ce4be5aed16067ec0 grubaa64.efi
