Re: [foxboro] Legacy Historians and Version 6.5

Possibly not related but
Are you using mirrored disks, if so there is a QF1003991B that correctly
puts informix on the secondary drive. We just proved that 6.4 thru 6.5.3
causes the problem=20
Without the QF booting from the secondary disk trashes informix this
also means mirror_backup does not correctly backup informix
Shaun

-----Original Message-----
From: foxboro-bounce@xxxxxxxxxxxxx [mailto:foxboro-bounce@xxxxxxxxxxxxx]
On Behalf Of Teresa L Heckathorn
Sent: Wednesday, 21 February 2007 10:13
To: foxboro@xxxxxxxxxxxxx
Subject: [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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