I have one computer now with 1 SSD and 3 hard drives in it. The OS is on the SSD.
I was wondering whether the HD are "on" or spinning, when I boot the computer.
The reason I'm asking is I want to know whether the act of just turning on the computer shortens the lifespan of the HD or whether it has to be mounted and in use. Is the (let's say for example) 100,000 hour lifesapn of a hard drive based on read/write times, or just the fact that it's spinning and in some ready state.