During an upgrade, parmlibs can be transferred and used in the new version. Where can you find the actual active definitions?
You can run either console command for Vtape
DISPLAY PARMLIB LOG
or
SVTS D P,L
This will show you what parmlib parameters are being loaded up. Copy/paste these parameters or check during startup of Vtape and it will show you the same information.
Display Parmlib command