Last night Steve O. caught that the tower DSM had stopped writing to the USB disk because it had filled up. I turned on --remove-source-files in the rsyncs from barolo, so that has cleaned off the disk and should prevent it from filling up again. The rsync script leaves the most recent 7 days of data files on the local disk.
In restarting the DSM process last night, the emerald card did not come back, and so we lost winds and TRH above 10m from around 2016-09-16 23:30 to 2016-09-17 13:30 UTC. This issue with the emerald cards is being tracked in a JIRA issue: ISFS-127. I got things working again this morning by rebooting the dsm.