I'm wanting to refine my understanding of what 'free space' is on a computer. Doing my background reading I've come to see that their are two instances in which 'free space' is referenced. I don't believe that they reference the same kind of 'free space' though.
There is the free space on a HD. Say, you have C: or / partitioned at 10 GB and utilizing 3 GB for their respective OS. This leaves each with 7 GB of 'free space'
When partitioning your drives to make the most efficient use of your HD space, you partition your spaces 'into' a 'free space'. So you have a 30 GB HD, you partition 10 GB for C: and 10 GB for / (maybe a 2 GB swap) leaving you with 8 GB of 'free space'.
What happens with that remaining 8 GB of 'free space' NOT designated a partitioning preference. If I'm correct, this 'free space' wont be recognizable by your OS for you to utilize in some meaningful way.
Would someone so kindly give me an astute academic definition of HOW this 'free space' functions when undesignated.