Well what you are trying will surely not work...
If I follow you, the idea is to show via SAN the disk to a remote server ,am I right?
In this case you should not use vgcreate or whatever but make a safe copy using vgexport or exportvg (aix) look at the man pages since I dont have the syntax in mind :
A mistake and you are doomed... I would say in HPUX you would use
vgexport -s -p -m -v mapfile.vgXX /dev/vgXX

using the mapfile you on the remote box can import the vg giving it a newname and hope you mount it read only or use the -e (exclusive) mode

This is what we are to do when using HACMP(AIX) or MCSG (HP)... (but can be done without the soft...)