As I type this, I'm installing Fedora 20 on a UEFI system which already has CentOS 7 (and nothing else).
Should the two systems share /boot/efi?
As I understand it, the answer is yes: /boot/efi is universal on a machine. It is where the firmware goes to load things. Not just OS bootloader: manufacturer-supplied EFI utilities can live there too.
But Fedora, by default, wants to create a new /boot/efi.
What is the right thing to do? What will work?
In the current installation, I've forced Fedora to use the existing /boot/efi. I guess I'll see how that turns out.
I could not see any guidance in the Fedora 20 installation guide. https://docs.fedoraproject.org/en-US/Fedora/20/html/Installation_Guide/s1-diskpartitioning-x86.html In fact, the appendix on disk partitions didn't deal with EFI/UEFI/GPT, something I could have used. (After 20 years of living with MBR, I kind of got the hang of it.)
On Aug 31, 2014, at 8:50 AM, D. Hugh Redelmeier hugh@mimosa.com wrote:
As I type this, I'm installing Fedora 20 on a UEFI system which already has CentOS 7 (and nothing else).
Should the two systems share /boot/efi?
Ideally yes, although it's not required by the UEFI spec.
As I understand it, the answer is yes: /boot/efi is universal on a machine. It is where the firmware goes to load things. Not just OS bootloader: manufacturer-supplied EFI utilities can live there too.
But Fedora, by default, wants to create a new /boot/efi.
What is the right thing to do? What will work?
Either but it's simpler for future troubleshooting if you have one ESP per drive. It's only particularly important to have one when dual booting Windows because it gets pissy if there are two ESPs.
In the current installation, I've forced Fedora to use the existing /boot/efi. I guess I'll see how that turns out.
That's fine.
Chris Murphy
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Chris Murphy -
D. Hugh Redelmeier