When searching the internet for UEFI, I found two types of articles: one type "explains" to me that UEFI is the modern alternative to MBR booting, that it's widely supported by now and that I should probably use it. The other type of articles offers step by step instructions to solve a very specific problem. I couldn't find an article though explaining the concepts of UEFI.
Some questions that come to mind:
So far I understand that there is a small EFI partition that plays a key role. But what does it actually contain and what does it do? Not necessarily down to the last file, but a general overview.
In the BIOS I can see UEFI boot entries. How does the BIOS know about them? Are these saved to the BIOS on installation? Or does the BIOS scan the EFI partition on boot?
In a multi OS environment it seems that there is a EFI partition on every disk with an operating system. Does every operating system need its own EFI partition, or can different OS's share the same EFI partition?
