aix olympics:

could you tell what are you are trying to do ?

1) access the Shared DATA on the San Storage from your two AIX Machines ?

2) like bakunin said, if it is not concurrent then you can varyonvg on both machines ?

you can find out if it is enhanced concurrent or not just simply by checking the characteristics of the volume group
lsvg VG_NAME
or
lspv

HDISKXXX ---> active (for normal)
HDISKXXX --> Concurrent if it is concurrent.

Then we can proceed.