UEFI - The New Booting OS

November 18, 2014

UEFI - The New Boot Operating System In Your Computer

LIU/Brooklyn System Architechture

UEFI Device Paths cont

The GNU Tool efibootmgr allows for the manipulation of the efi bootloader and displays its settings and paths

[root@system directory]# efibootmgr -v
BootCurrent: 0002
Timeout: 3 seconds
BootOrder: 0003,0002,0000,0004
Boot0000* CD/DVD Drive  BIOS(3,0,00)
Boot0001* Hard Drive    HD(2,0,00)
Boot0002* Fedora
HD(1,800,61800,6d98f360-cb3e-4727-8fed-5ce0c040365d)File(\EFI\fedora\grubx64.efi)
Boot0003* opensuse
HD(1,800,61800,6d98f360-cb3e-4727-8fed-5ce0c040365d)File(\EFI\opensuse\grubx64.efi)
Boot0004* Hard Drive    BIOS(2,0,00)P0: ST1500DM003-9YN16G        .

Boot0000, and Boot0004 are legacy bios boot entries.
Boot0002 and Boot0003 are native UEFI entries which point to different secondary boot loaders, both being on the same hard drive device.
Boot0001 is a UEFI default boot if all else fails. It also is used for plug in boot devices (flash drives).