You're right this is some Linux Output .
I currently do not have my AIX available, So I've decided to test on LInux. I thought LVM behaviour was the same on both AIX and LInux.

Is the following make sense to you :

Site 1 :
Storage 1 : Volume and LUN presented to AIX 1 only : readwritable. ( LVM was used to create vg, pv, lv on the presented LUN)

Site 2:
Storage 2 : replicated Volume and LUN presented to AIX 2 only : read-only (until mirror is manually broken (disaster recoery scenario).

Suppose disaster recovery occurs, mirror is manually broken : LUN is getting read write attribute and of course Data are already present on the LUN.
HOW do I proceed to mount this LUN to my AIX WITHOUT FORMATING ??

Any idea ?
Thanks
Ivan