Trying multi boot: Ubuntu, Windows 11, and FreeBSD

My computer has three M.2 2 TB drives: 1 Samsung (Windows 11), two Western Digital (One has Ubuntu 24 LTS).
I want to install FreeBSD on the WD M.2 drive with no OS on it. However, during the installation process I can not differentiate which of the Western Digital M.2 drives has Ubuntu Linux and which not. Is there a way to see this difference? I certainly do not want to wipe out my Windows 11 nor my Ubuntu. All my drives use UEFI Bios.

Thanks in advance
 
Definitely screwdriver approach here.

You could go real fancy and get the serial numbers of the WDs in Linux, then cross-check in a rescue shell in the FreeBSD installer. But even then you could screw up.
 
I apologize in advance, but I am still interested to know: do you have a licensed, updatable Windows or a pirated version (build)? The thing is, if the Windows build is in multi-boot, then nasty things and problems may pop up in the future.
 
However, during the installation process I can not differentiate which of the Western Digital M.2 drives has Ubuntu Linux and which not.
Drop into a shell and look at the contents of each "device". The partition type may differ. Or, put a file someplace "convenient" on the Ubuntu system (by booting into it and doing something like "touch /This_is_Ubuntu"). Then, mount the partition(s) of each drive and go looking for said file.

Or, put a unique label in the disklabel ("@%#%@^@&##") and grep for that in the raw device(s)

[This will either "hit" instantly or not at all; in which case, just abort the process instead of letting it scan the entire 2TB]
 
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