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There is definitely a timing distribution malfunction at the c1iscex IO chassis. There is no timing link between the "Master Timer Sequencer D050239" at the 1X6 and the c1iscex IO chassis. Link lights at both ends are dead. No timing, no running models.
It does not appear to be a problem with the Master Timer Sequencer. I moved the c1iscey link to the J15 port on the sequencer and it worked fine. This means its either a problem with the fiber or the timing card in the IO chassis. The IO timing card is powered and does have what appear to be normal status lights on (except for the fiber link lights). It's getting what I think is the nominal 4V power. The connection to the IO chassis backplane board look ok. So maybe it's just a dead fiber issue?
I do not know what could have been the problem with c1auxex, or if it's related to the fast timing issue.
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I just got over here from Downs, where I managed to convince Todd to let me borrow one of their three remaining timing slave boards for c1iscex. I walked down to the X end to replace the board only to discover that the link light on the existing timing board was back! c1iscex was not responding, so I hard rebooted the machine, and everything came up rosy (all green!):
To repeat, I DID NOTHING. The thing was working when I got here. I have no idea when it came back, or how, but it's at least working for the moment. I re-enabled the watchdog for ETMX SUS and it's now damped normally.
I'm going to hold on to the timing card for a couple of days, in case the failure comes back, but we'll need to return it to Downs soon, and probably think about getting some spare backups from Columbia. |