My Synology (10 disks) suddenly doesn't reboot.
Connecting it with the serial port, I could manage to boot on "Synology 1" and "Synology 2"
Synology 1, is a kind of "recovery partition" allowing you to recover your DSM with the synology assistant.
Synology 2, is the default boot option and boots on your DSM. In my case, the synology server fails to boot.
I've an raid 5 of 10 disks.
How to recover it