Auto unmount and remount external drive

Hi,

relatively new to LE and not too much Linux experience.

I use an Amlogic box, files are on an external USB disk. All devices go through an AVR. When finished with media consumption I switch the power off for all devices.

Here comes the issue: the LE box boots automatically when I switch on the power. when I did something else in the end, the Kodi box does not receive the CEC shutdown signal when the TV is switched off. So it is still on when I cut the power. It doesn't care to be hard shut off, but the HDD does.

My idea is to tell LE to unmount the disk when not in use for x minutes and remount on the next action. Is this possible (with an arson)? Or do you have another idea to protect the hdd from hard shut off?

Thank you!

Quote from trogggy

Every time you turn that box off by pulling the plug a kitten dies. Would it not be better to sort that out?

It's not like it happens often, when I am finished with LE I normally send it to standby like everything else before cutting the power.
Even if I only use the BDP I normally remember to switch to the LE box and switch it off. So only a moderate amount of kittens will be sacrificed over the years anyway.
But I am not the only one using the TV and everything else here and I am not slapping a big sticker on the remote or something like that.
So really I am looking for an elegant solution to protect the disk from accidental hard off.
I would not be opposed to sending the whole LE to standby after a set period of time if could get it back on with the remote (Flirc).

When I tried last time suspend wasn't working at all in the amlogic builds and the problem is that the flirc doesn't get power in suspend either, but I will try again. Thank you for your answer!

EDIT: still like that, so suspend unfortunately is a nogo for me, hence the need to just put the USB drive to sleep. any further ideas?