@scottalanmiller I couldn't find a way to mark the post as closed/ answered. Do I need to do anything to shut this one down?
It's currently marked as a discussion rather than as a question. In theory you can use the Topic Tools and "Mark as Question". Once it is a question, then you can go to an individual post and mark that one as the answer OR you can use the Topic Tools again and just mark it generically answered.
Last system I checked LVM and mapper were equal symlinks pointing to the same thing. I checked it because I was documenting on CentOS.
Still interesting. Device mapper is just that, a mapper pointing to LVM (and LUKS) devices for example. So your mapper and LVM are both pointing to something "physical" like md devices or sd*?
Both pointing to the dm device, which is another layer of mapping.