USB HDD always spin down after few minutes

Hi.

I'm using version 13 night builds on my GMKtec G3 Plus (version 12 doesn's work on my box).

I have an USB hard drive connected via USB and have no problem in general but when I pause a movie or anything I'm watching for just few minutes, HDD spins down.

I tried to use hdparm in autostart.sh with this command: "hdparm -S 0 /dev/sda2" and also "/usr/bin/hdparm -S /dev/sda2" but with no luck: if I pause my watching, HDD spins down, always.

If I open a shell (ssh) and run the command "hdparm -S 0 /dev/sda2" when HDD is down then it resumes so, I guess, the command is correct but when inserted in autostart.sh it doesn't work.

If I shutdown LibreElec keeping HDD on it never spins down so I guess it's LibreElec that somehow spins HDD down in some way.

What am I doing wrong? Is there anything else I can do to avoid the spinning down of my HDD after few minutes?

Thanks a lot,

Michele.

I'll give it a try late in the evening.

The thing that looks stange to me is the fact that if I lunch the command "hdparm -S 0 /dev/sda2" from an SSH shell when the HDD is sleeping then it start to spin up immediately.

Thanks a lot for your advice.

Not working, modified script in "hdparm -S 0 /dev/sda", rebooted and after few minutes HDD spins down.

I noted one thing, if I launch the command "hdparm -S 0 /dev/sda" from an SSH shell HDD spins UP and "Setting StanBy to 0 (off)" appears on console but after few minutes HDD spins down again.

I really don't undestand what's going on. This is the third HDD I try and with all of them I have the same result. This must something inside LibreElec or its operative system.

Any other idea?