Where is a mounted iso read from?

mikegreen1234

Commendable
Dec 15, 2016
1
0
1,510
For example, say i have 2 drive one for storing iso's and another where my application that I am mounting them to is located.

After the iso is mounted where is it being read from; the 1st, or 2nd drive?

The reason why I am asking is that I want to get an SSD for my applications and use a slower HD to store my iso's. I want to know if doing so will slow down how fast the mounted iso is being read.