Here is a list of known issues and bugs with Debian on the QNAP TS-209:
- The installer fails to make the system bootable, especially on
configurations with LVM and RAID. You can apply a
- qcontrol (the tool to control LEDs and beeper) doesn't work.
- The Linux kernel in Debian 10 fails to boot. Do not upgrade to Debian 10 (buster) until this issue is resolved!