Hi, John Roman wrote: > As a Gentoo user,
In 2016 the Gentoo ISOs were BIOS-only. I now downloaded install-amd64-minimal-20180913T214501Z.iso which looks much like a Debian ISO, partition-wise. xorriso -indev install-amd64-minimal-20180913T214501Z.iso \ -report_system_area plain reports: MBR partition table: N Status Type Start Blocks MBR partition : 1 0x80 0x00 0 477184 MBR partition : 2 0x00 0xef 160 12912 MBR partition path : 2 /gentoo.efimg ... GPT : N Info GPT disk GUID : 8d5cbf80b3cc5142b9803969f661ef0c ... The file /gentoo.efimg in the ISO serves as System Partition The GPT stuff is invalid, as usual with this layout. > Sadly, this seems like one > more nail in the coffin of reasons I need to upgrade my PC. Can't you talk its firmware into BIOS emulating legacy mode ? You could even use program fdisk to delete partition entry 2 in the ISO in order to take away the USB boot lure for EFI. Some firmwares are said to fall back to BIOS emulation automatically. Have a nice day :) Thomas