When you are doing a full system save in dedicated mode, like the two I
have going now while doing a Power 6 to Power 8 migration, I suggest using
STRBKUBRM CTLGRP(...) SBMJOB(*NO) OMITS(*IGNORE)
The key thing there being OMITS(*IGNORE).
You will find out that IBM went hog wild with 7.2 and flagged a plethora
of directories with
CHGATR ATR(*ALWSAV) VALUE(*NO)
/PSF400 was not one of them changed.