My QNAP 410 (ARN) didn't come back after a restart the other night.
I ended up reverting the FW, then needed to run-through the "QNAP Setup Wizard" to regain access to the QNAP Web Console. I didn't realise at the time, but it appears the Setup process has stripped the RAID config from my array!!!! (I suspect it does this, to prepare any connected drives for a new setup)
I'm now stuck - trying to get assistance from QNAP Support. I hope someone can recover the RAID config (as I've come to the end of my Linux expertise).
Thanks for this article. Any further assistance/advice you could provide would be greatly appreciated.