Changes between Version 26 and Version 27 of Production_Work_Log

Timestamp:

Nov 10, 2011, 3:37:27 PM (15 years ago)

Author:

huntley

Comment:

--

Production_Work_Log

@@ -2 +2 @@
 
 = 2011 Production Node Work =
+
+== Nov 10 ==
+ * Haydn visited MHPCC.
+ * Installed a new BBU in ippdb02.
+ * Checked ipp029, because it was reported to crash quickly under load.  The CPU heat sinks had not been installed correctly.  Heat sink compound covered only ~50% of the CPU's.  Removed the old heat sink compound and used Artic Silver 5.  We should probably do this for all of the machines in this series -- just because they aren't crashing, doesn't mean they were installed correctly.  They are probably simply throttling themselves to avoid thermal failure.
+ * Checked ippc11, because it was reported to crash under load every few days.  Burned myself slightly when my bare forearm touched the bottom of the case.  This is a 1U machine, and the power supply is incredibly hot (~55 deg C).  Removed the CPU heat sinks, but they had originally been installed correctly.  Re-racked the machine, but other machines with the same design have power supplies which are much cooler.  Perhaps the power supply is failing, or one of the fans in it has failed.  Because this is a 1U machine, the CPU heat sinks depend on the cover being on in order to get good air flow across them, but next time I'm there, there is a spare power supply which might work in this machine, and I can try running it with the top off for a few seconds to check if the power supply fans are working or not.
+ * Reseated the memory in ipp065, but it still reports only 40GB instead of 48GB.
 
 == Nov 7 ==