SDD SDDPCM MPIO lspath Jargon

Can anyone recommend me some reading material surrounding how AIX handles LUNs:

  • with and without MPIO installed
  • with and without SDD or SDDPCM installed
    Where does lspath sit in all of this (MPIO layer?). Can a system be built with just MPIO software? Is MPIO software even needed?

I guess I am trying to conceptualize what is seen on a system before and after you install the above software.