[foxboro] Legacy Historians and Version 6.5

Several Legacy Historians on our plant site have had corrupted database
issues that have caused the systems to loose all data including
configuration.  This has happened to five systems on site.  This phenomenon
has only started happening since the systems were updated to version 6.5
and up. The latest incident occurred when two historians running on 51B
boxes totally erased their database.  Now we will be required to completely
re-configure both historians.  Before the last incident, the historians
were only partially corrupted.  This occurrence has happened on both 51B
and 51E boxes.

      We are theorizing that upon shutting down for a tape backup that
something happens within the Informix system that is causing the database
to get corrupted.  Corey Clingo has now written a script that will stop
Informix as the system is shutting down.  We will need to wait and see if
this will solve the problem.

      We are theorizing something that was changed with Version 6.5 has
started this phenomenon.  Is there anyone else out there in the Foxboro
world that has had a similar occurrence?  And if you have, what did you do
to fix it?


Tracy Heckathorn
BASF Corporation

 
 
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