To run the mksysb backups on each LPAR run the following command, replacing /dev/rmt0 with the output device or storage location.
mksysb -i /dev/rmt0
To backup the volume groups run the following but replace /dev/rmt1 with the output device or storage location
savevg -mf /dev/rmt1 data2
To export the system configuration run the following command and transfer the pax file from /tmp/ibmsupt
All of these files can be zipped up if that helps.