The NAS that has the BDA on it has died. Disks and content is all OK, but it is not in a healthy state. It keeps rebooting every hour or so. No BDA for the weekend at the moment.
UPDATE: I took the NAS out of the rack to test it on the bench. Plugged it in... Sparks... Circuit breaker blew. Power supply = dead. New power supply ordered, but none available locally. We have to wait a bit... :(
UPDATE: PSU arrived - Planning on racking the NAS tomorrow. Stay tuned!