Le 15/09/2018 à 03:55, John Roman a écrit :
the USB install media for netinst and live both create a dos partition
table on dd, and cp.
"On dd, and cp" ?
By default, the Debian installer creates a DOS partition table when
booted in BIOS/legacy mode and a GPT partition table when booted in EFI
mode. But if you select "expert install" in the boot menu and manual
partitioning, you will be given the choice between DOS and GPT when
creating a new "disk label" (partition table).
This will result in media that can only be booted
legacy, as GPT is a requirement for EFI boot.
Others already addressed this point.
Besides, what's wrong with booting in legacy mode ?