Is there a way to disable the "enter a password to unlock the disk" prompt for a disk? I installed macOS on a partition in an external drive which is encrypted with FireVault. I don't want to mount it when I plug it in, but I get the "enter a password to unlock the disk" prompt whenever I plug the drive in (which is fairly often) and I need to escape out of it every time. Is there a way to stop showing this prompt, while not having to mount it? You can prevent it from coming up with the "[remember password in keychain]" option but that would mount it every time.
I found this, which is basically the same as the quora.com method (link above):

http://www.idownloadblog.com/2016/11/24/prevent-partitions-from-mounting-mac/

However, for me, although it DOES prevent the volume from being mounted on startup, so far it DOES NOT prevent the popup "enter a password to unlock the disk".