firstly - kind of a linux noob here, so go easy on me…
I have succesfully installed Dietpi (great work, btw!) on a Rpi4 2gb and have a WD red 2TB connected via an externally powered 2-bay dock. The dock is connected via USB3. There was no problem formatting and adding the drive, and the setup itself works fine - nzbget, sonarr, couchpotato and NFS share on RPI - KODI on a NVIDIA shield tv. The problem is, that the HDD disappears and the only way to make the system discover it again/force the HDD to wake up, is to yank the usb-plug and reconnect. I would certainly like to make use of the HDD powering down, when not in use, but how do i make sure the Rpi send a “wake-signal”, when for instance, NZBget would like to write to the HDD, or KODI wants to read from it?