I will try to follow your advice and call IBM.
For now, we are allowed to "play" with a idle machine. We try to install a test database in order to release load on a production machine...
I deleted my vg and made it all again and everything worked correctly.
diag did not give me more info (or I did not get them from it).
As I have very limited info about the hardware, I will carry...
When I tried to mount /appli21 with smit, the terminal "freezed" (ssh connection still active but always showing the same window, no new telnel or ssh connection allowed) and I had to have...