A new ODM database is available since AIX6.1TL9 or AIX7.1TL3, that will keep all changes that aren't applied before next reboot (Also a new command lsdev -Pl <device> -a <parameter>)
[root@aixsrv]/etc/objrepos# odmget CuAtSav CuAtSav: name = "vscsi0" attribute = "vscsi_path_to" value = "0" generic = "DU" CuAtSav: name = "vscsi0" attribute = "vscsi_err_recov" value = "delayed_fail" generic = "DU"