Dual Boot Windows 10 with shared EFI-Partition

Are_you

I'm trying to get Dual Boot with my "not able to upgrade" Windows 10 System running. I've already set up a fresh Windows system.
While Installing Ghostbsd I wanted to use UFS instead of ZFS for my GhostBSD installation, because I don't need the features and I've already have limited space.

But when I click "Custom configiuration" in the installation gui, and create a UFS partition and a Swap space in the remaining space I can't go further. Next is greyed out without telling me why. The newly created partitions didn't have a mountpath, so I assumed this was the error.

So I created the partition by hand, mounted it in /mnt/ and the efi table in /mnt/boot/efi and then I tried again, but the installer just doesn't let me continue.

Can I just do the installation without the gui, with the partition I have in mind, then install GhostBSD in the EFI table and Grub? Or is there a way to tell the installation before (with some kind of global variable) where I want Ghostbsd installed.

Here is my ada1 setup:
ada1p1 EFI
ada1p2 Windows
ada1p3 (some more Windows stuff)
ada1p4 (even more Windows stuff)
ada1p5 -> UFS I created and mounted for Ghostbsd
ada1p6 -> Swap

I would really like to get that setup going. I only need Windows to play games, but I still need it. Ghostbsd is meant for working and having a up to date system system.

vimanuelt

GhostBSD is designed to occupy an entire disk rather than just a partition. If you’d like to run both GhostBSD and Windows, the simplest and most reliable approach is to install each on its own disk; this also eliminates a single point of failure.

You can submit a feature request to see if Eric might consider adding single-partition support. If that’s not approved and you still want to experiment, you’ll need to create a custom installer and ensure network connectivity to fetch packages. It’s a manageable afternoon project with the help of an LLM, but keep in mind that such a configuration isn’t officially supported by the GhostBSD project.