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Jun 29, 2009
DOR card on sps-ichub71 changed
Author: Erik
Mood: tired, but still very good
Start: 22:00UTC, End:00:40UTC, Issue: DOR card swap on sps-ichub71
At 10pm UTC, the acquisition stopped again, and according to the logs, the culprit
was sps-ichub71 again.
We found the problem.
There is a GPS problem on sps-ichub71.
----------- Hub: sps-ichub71 crd0 . crd1 . crd2 . crd3 . crd4 . crd5 . crd6 BAD crd7 . -----------So I started a run without this string and we went to the ICL to see if the GPS cable was loose inside the hub or change the DOR card.
Both of us remembered having the exact same problem about a month ago, run starting but no rates. So we took a look at the logbook, and we found that the exact same symptom appeared on May 27th, on sps-ichub71 with DOR card 6. And the last sentence I wrote on that log entry was : "we will keep an eye on this DOR card".
So we decided to change the card, and the old one in the "to be tested pile".
During the hub shutdown and surgery, I accidentally switched off sps-ichub17 causing run #114051 to crash. Sorry about that, these pages woke us up really early this morning... run #114052 is still with no string 71.
At 00:20 UTC we started a new run with ful detector and a new (repaired) DOR card in sps-ichub71.
Erik.
Erik Verhagen
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29 Jun 2009 19:22 GMT
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Ice Cube/Runs
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