If you own a Synology NAS, you probably know the trouble that it frequently wakes up from hibernation without any obvious reason. Synology has added a more or less undocumented debugger for that issue. If enabled, it will log the reason for waking up from its beauty sleep, so one can take measures against it.
WARNING: This article is targeted at experienced Linux users. Even if you manage to enable the debug mode, you still have to analyze the log files, find a solution to your individual problem, and assess if it is safe to apply. If you make a mistake, you can cause a lot of damage to your system and your data. Please take this advice seriously.
In any case, make sure your data is properly backed-up. Remember that a RAID is not a backup!
Also note that the debug mechanism has changed from time to time, so it may be completely different on your NAS depending on the DSM version that is used.Continue reading...