IBM AS400 questions

Alright, it was quite a while back that I picked up my ibm AS400 model 170. I had asked some questions on the list, it was locked with a password and i could not get into the machine. I finally got around to getting into the machine and am at the main menu. Before i do anything, I want to back up the machine. I have a couple of tapes. I am not familiar with os/400 at all, the intention is to backup the machine so in the event of a hardware failure I will be able to reinstall and still have a licenced install. I come from the sgi land, usually from the prom there is the HINV command to give a nice hardware inventory of the machine, is there a similar command in the ibm world? I want to find what options are installed, cpu and memory details, etc. Any advice on what to do from here is much appreciated. I just want to get the thing backed up and rest assured that if the drives fail i can reinstall the os and it have its license. --Devin