> > > The Gentoo Handbook says to create a small unformatted partition at the > > beginning of the (primary?) disk, then to create a FAT-32 partition for > > /boot, then whatever other partitions are required. > > Another question answered: yes, it has to be the primary disk. I installed > a > small test system on another disk. It has its own FAT-32 /boot partition, > in > which I set up a similar directory structure to the main system's. > Efibootmgr > still insisted on adding the UEFI entry to the main set, in spite of my > telling it to use the secondary disk. And the BIOS couldn't see the image > on > the secondary disk. >
I found my BIOS didn't recognise the UEFI setup until it was specified/setup by efibootmgr, so that checks out. What was the efibootmgr command you were using for the second disk? The conclusion is that, at least on this motherboard, there is precisely > one > set of UEFI boot images, and it lives on the primary disk of the system. > Well, > I haven't yet worked out how much of it is on the disk and how much in > BIOS > storage. The point remains, however, that I can't spread boot images over > several disks. > That's pretty poor. What does efibootmgr show? I got the impression that I would be able to UEFI boot from multiple different devices, eg a USB drive with UEFI as well as the hard disk.
