If the upgrade path you choose does not retain the user account profiles on your system, use ap(ADM) to preserve the account profiles.
Before beginning the installation, run:
ap -dg > filename
This copies the account profiles, including group membership information, of every user listed in the password file into the file filename. Back up this output file.
After completing the installation, copy the file filename
to the new system, and run:
ap -ro -ffilename
This restores the account profiles for every user, overwriting any existing account profiles of the same name (including root).