Hi guys, thanks for the help!
the solution was indeed the storage spaces pool.
For some reason it created a storage pool with another drive, because of this it wouldnt show up in Disk manager.
I deleted the storage pool and then it showed up again.
now i can make a new volume with this disk,
It should list all connected and supported drives. If your drive isn't there, then you most likely have something disabled in BIOS. If it is there, then you have a driver issue. We can troubleshoot further from here.
Sorry for reviving this but similar issue, but I did list disk and I think I see it there.
It is also in device manager, and somewhere in BIOS (not sure if it lets me set it as a boot, I forgot), but it's not in Disk Manager