We have not been able to reach the turbulence tower data system since Sep 29.
We could ping the RAL server in the seatainer from Boulder. Andy Gaydos logged into the server and could not ping the data system: 192.168.100.202. So either the data system or the network between the seatainer and the tower was down.
On Oct 6 I was able to ssh to the DSM. So somebody fixed the problem, or perhaps a fiber<->copper transceiver reset itself.
I did not see anything in /var/log/isfs/messages about eth0 going down/up.
The DSM did not go down, so it wasn't a DSM power problem:
root@manitou root# date Thu Oct 6 22:44:24 GMT 2011 root@manitou root# uptime 22:45:18 up 464 days, 3:22, 2 users, load average: 0.02, 0.05, 0.00