I noticed there were scheduled maintenance downtimes recently. One server was restarted two times, on 15th and 27th November. Both times due to RAID controller batteries replacement. I don't care much that single server was down two times, although it is weird, but on both occasions I wasn't aware of the scheduled downtime.
I know Nodes maintenance is announced in Status Update in administration panel, but is it possible to be notified about downtimes also via email? I didn't find that option anywhere.