Looking at the nvidia forums it would seem there is a pretty pervasive issue with possibly poorly implemented storage access layer access In some apps causing the shield to drop the disk.
I don’t have anything but the DVR server installed on the system. I uninstalled plex. I wonder if The drive is being denied to protect it when it senses some kind of behavior it doesn’t like on the channels DVR server doing maintenance or something?
We were watching tv remotely last night before bed - The drive was disconnected this am. Same thing happened on the Sd card in the tube last week. Same overnight timing.
From an old nvidia forum post:
“ It's not a Nvidia problem. I have 3 Shields all with some form of external drive attached and none ever unmount. If you don't have ES installed, then most likely some other app that improperly implements the Storage Access Framework for full permissions (which is why ES cause external drives to unmount).”
It’s possible channels is doing everything perfectly but this seems to be suspect.