Well, the title pretty much says what I want to do. Even if the DS213+ is on top of a living room cupboard, it’s still way to bright .. as I don’t need really need the LED, here’s a quick hack (the ID and the device is taken from the Synology Wiki) on how to disable it on each startup:
case $1 in
echo "Disabling Power LED"
echo 6 > /dev/ttyS1
Just place the file in /opt/etc/init.d/S01leds and the script is gonna turn the LED off during a boot/reboot.