Hyper V configure with SAN

[irsprint84]

I m converting my servers from XEN to Hyper V now I m worried about 1 thing and searches seem very vague about it:

 

When I go to install Hyper V it sees both SAN disks as OFFLINE (disk 1 is still XEN for server1 and disk 2 is free for server2 to install Hyoer V - fibre channel) now do I make disk two 'online' for server 2 and because server 2 uses disk 1 for XEN this should affect disk 1 unless I made disk 1 online?

 

Just dont want to destroy disk 1 for server 1 by mistake!