I've heard the saw about reinstalling the OS every 70 days. However, I
thought that IBM figured out people were doing that and figured out a way
to block that also.
Ideally, install the keys.
Did you never put program license keys on for V5R4? Was the upgrade to
V5R4 simply a stepping stone to get the 270 upgraded to some newer box? I
upgraded our old 270 from V5R4M0 to V5R4M5 just to do an unload/reload on
to a Power 6. (some years ago).