USB Power shutdown method? And Hard drives?

Single Board Computers Odroid N2/N2Plus/C4
16

I really don’t see why hdds can’t be automatically shut down before Coreelec turns off like win10 does? Oh well, it’s really not that hard to do before quitting-just 1 or 2 more remote button presses.

17

That would be great improvement, but according https://github.com/xbmc/xbmc/blob/aa39210197323230c1c2ab086a6f2a18f39daf9a/xbmc/storage/MediaManager.cpp Eject(mountpath) would need to be called before shutdown/poweroff.

But there must be some decision making whats removable disc (ie sdX or such).

I think its not too hard implement it only for AML (CE), but in optimal way (not workaround) this should be handled within Kodi itself.

18

shutdown.sh bash script is called on shutdown: https://wiki.libreelec.tv/autostart.sh
It should be easy to write a script to unmount all devices mounted under /media.

For a start: https://stackoverflow.com/questions/19751624/how-to-unmount-all-usb-pen-drive-from-ubuntu-with-bash-script-or-terminal

3 Likes
19

thats nice and easy option there, thanks. I will add umount commands for installations using USB HDD for /storage (as I think USB flashdrives are just fine).

Not sure if HDD shouldnt be handled also for restarts though…

20

Can you make such a “Shutdown.sh” for us that are not at home with Linux ?

21

Run this two commands in ssh console and check if reboot or powering off unmounts usb disks.

wget -O /storage/.config/shutdown.sh https://pastebin.com/raw/ypmbcrEu
dos2unix /storage/.config/shutdown.sh
1 Like
22

Is ‘umount’ a sufficient command?
Yes it will unmount the filesystem, but is ‘eject’ not required to withdraw power from the device?

… maybe that has changed …

23

Does Kodi eject really eject the drive or just unmount it? I think it only unmount.

24

I did, it downloaded and placed shutdown.sh in proper place, then I run the second command and turned off N2. When USB power was cut off disk “clanked” as it does when I don’t remove it safely in Kodi Power Menu. So this does not work for my USB disk…

Btw, my USB HD is mounted as /dev/sda1; should that be put in the command instead
/dev/disk/by-id/usb-* ?

25

Seems Kodi eject is doing something more.

You can try using hdparm like

hdparm -y /dev/sda
26

Running hdparm -y /dev/sda1
response: issuing standby command

and USB HD drive goes to sleep.

27

Then use this command after partitions are unmounted in shutdown.sh.

28

Where exactly do I put it, like this:

for usb_dev in /dev/disk/by-id/usb-*; do
dev=$(readlink -f $usb_dev)
grep -qw ^$dev /proc/mounts && umount $dev
hdparm -y /dev/sda1
done

29 
for usb_dev in /dev/disk/by-id/usb-*; do
  dev=$(readlink -f $usb_dev)
  grep -qw ^$dev /proc/mounts && umount $dev
  hdparm -y $dev
done

Or maybe better

for usb_dev in /dev/disk/by-id/usb-*; do
  dev=$(readlink -f $usb_dev)
  grep -qw ^$dev /proc/mounts && umount $dev
done
for usb_dev in /dev/disk/by-id/usb-*; do
  dev=$(readlink -f $usb_dev)
  hdparm -y $dev
done
30

No change with the first version, will try second version later when wife lets me fiddle with the player again :slight_smile:

EDIT, after some sweet talk I could try the second command also :slight_smile:

But, no change with reboot or power off, the drive still goes “clank”. Checking in System Info after running dos2unix /storage/.config/shutdown.sh command my USB HD is still mounted and all content is accessible.

31

dos2unix command only changes dos formatted shell script to unix :slight_smile:
If you want to execute manually run

sh /storage/.config/shutdown.sh poweroff
32

Well, no wander that there is no change :slight_smile:

But also no luck with proper command:
CoreELEC:~ # sh /storage/.config/shutdown.sh poweroff
/dev/disk/by-id/usb-*: No such file or directory

33

This indicates that there is no USB disk attached.

Will try to find some external USB disk to try it myself.

34

Strange, because just before running the command, and after it I watched my TV series from that disk :slight_smile:

35

It had previously been ejected?