What is the UEFI boot procedure, what components are involved, how to debug it? How to boot with UEFI from software raid?

Solution Verified - Updated -

Issue

  • What is the UEFI boot procedure, what components are involved, how to debug it?
  • How to boot with UEFI from software raid?
  • Why are "device" lines in grub.conf like the following, is that supported by Red Hat?
device (hd0) HD(1,800,64000,7630c268-d76e-4937-9f2d-273e2c9d300c)

Environment

  • Red Hat Enterprise Linux
  • UEFI
  • grub

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