Lets say you get the 1TB fusion, can you split the SSD side and use it? I was under the assumption the fusion software dictates this, Also, lets say your fusion drives HDD portion fails, can you still boot OSX if its loaded on the SSD or is the drive always considered one?
and if OSX determines what goes on fusion and what goes on SSD, is it constantly doing this, taking up ram or CPU usage slightly in the background processing? just some questions, Ive only been using OSX for 3 weeks now (only owned windows before).
Yes, absolutely you can split it up and created drives, one SSD and one HDD. That's what I'm planning on doing to my 3tb FD. Keep in mind if you get the 1TB you'll only have 24gb ssd to work with, a much better deal is the 2TB FD if you do decide to go for that.
If one part of your drive fails in a fusion setup then your whole drive fails. If you separate them then you will still have the other.
Yes it is indexing your files in the background but it is so little power that I doubt it will have any impact on your CPU or RAM usage.