How do I get FreeBSD multiboot to work with zfs

cafe_carl

I have one hard drive that I want to split into two separate FreeBSD OS installs and I'm running into a wall trying to figure out how to get it working. I followed Installing FreeBSD Root on ZFS using GPT in order to get a single OS up and running. There are no problems and everything works great. However, I do not know how to modify this in order to get a second OS up and running. I repeat from steps 2 onward to create the second partition and...

Originally asked by quickblueblur on Stack Exchange (unix) (CC BY-SA 4.0).

uphilltech

Great question — answering as the UphillTech team:

How do you handle your multiboot? Do you use your motherboard's manufacturer menu or some loader (rEFInd for example)? I can be wrong but you should be able to boot the filesystem you want by specifying the rootdev environment variable to the FreeBSD loader. With your motherboard's manufacturer menu, you have to use efibootmgr and create 2 entries (you can use the same BOOTX64.efi/loader.efi for both as long as both systems are compatible with it - it depends on their respective FreeBSD version). From one of your system: # mount the EFI partition # reminder: BOOTX64.efi is a copy of /boot/loader.efi # adapt rootdev if you are not using BE on zroot1 efibootmgr -a -c -l...

Full answer by julp: https://unix.stackexchange.com/a/798344 (CC BY-SA 4.0).

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