Thank you for the clarification! Apparently that's not the answer I wanted to hear 
When I really have to go with Samba, then my whole LVM setup doesn't work. How could this be "adaptive" in any way? If I want my Central Services on Linux to be flexible, then I have to configure Samba on any potential host...
Or does only the installation procedure need the access to the SAPGLOBALHOST directories and afterwards there have to be no access to them?
Thanks, Matt