I have a very large library and have noticed that the scan is basically running continuously. Technically it does stop but only for a few minutes before the next scheduled one kicks off because each run takes so long.
This keeps the NAS from ever sleeping and runs the drives continuously.
I know the auto-scan makes this setup plug and play and for small libraries is likely quite convenient but it would be nice to be able to turn it off and run it on demand when I actually do add something due to the library size.
Related note - I am using all 3 categories (Movies, TV and Video) and it would be very helpful to be able to kick off the scan on the specific Source that I know I added content to in order to decrease the runtime.