[SeaBIOS] disk not shown in boot options

[Marco Moock]

Hello!

I ordered a virtual machine that uses qemu and seabios. The boot menu
shows the DVD drives, PXE etc, but not the HDD. The HDD is being
detected in the live system (FreeBSD) and I was able to let the
installer install the OS (FreeBSD 14.2) to it (GPT with bios-boot
partition).

Are there any checks before a device is being listed in the boot menu,
e.g. if there is an MBR partition with an active flag (already
experienced that on some motherboards)?

I would like to exclude the OS as a source for the problem.

Is there a way to list all devices?