This seems to be the relevant docs: https://uefi.org/specs/UEFI/2.11/03_Boot_Manager.html#boot-mechanisms
If I understand correctly, a partition table is not required, per that spec. Does anyone agree/disagree? On Thu, Aug 20, 2026 at 10:25 PM Carl Karsten <[email protected]> wrote: > Can someone point me to a spec or something that defines waht a valid uefi > boot device is? > > background: I use the hd-media image (becuase it is a fat fs so I can > mount and edit kernel boot parameters) but hd-image is not efi at all (it > doesn't even try.) I have an MR that addresses it but needs work: > https://salsa.debian.org/installer-team/debian-installer/-/merge_requests/7 > > The post is related, but new as I just now found an HP server that won't > boot my patched hd-media. and I am compelled to figure out what correct > is. > > What I did figure out: fdisk /dev/usb-stick, create 1 partition. dd the > hd-media.img to the partition instead of the host device. The HP likes > this. > > Once I find a good description of what the efi spec is, we can talk about > making hd-media efi. > > -- > Carl K > -- Carl K
