spin down during nights off during days

[amplatfus]

Hi

I just got the idea to put the HDD in spin down only during nights.
I created below scripts and thinking to put them in cru list. I am in development phase.
If you have any ideas please share. I searched the forums but did not find something similar.

#!/bin/sh
#spin down on during days
killall -q sd-idle-2.6
nvram set usb_idle_timeout=0
nvram commit

#!/bin/sh

#spin down during nights
nvram set usb_idle_timeout=7200
nvram commit
killall -q sd-idle-2.6
#process
sleep 10
sd-idle-2.6 -i 7200

BR.