Skip to main content
InSource Solutions

TN Hist229 Setting Wonderware Historian's Alternate Storage Location

insource logo large.jpg



The Wonderware Historian by default stores all data to what is called the Circular folder, and will automatically delete the oldest data from this location if hard drive space is limited.  There is also an Alternate storage location where data can be sent if this primary (circular) location becomes full, but this Alternate storage location is not set by default. 


  • Author: Dillon Perera
  • Published: 09/22/2015
  • Applies to: Wonderware InSQL/Historian 9.0 and higher




  1. Open the SMC by going to Start > Programs > Wonderware > System Management Console.
  2. Expand the Historian group until you see the server you are interested in.
  3. Expand the Configuration Editor section, and go to Storage > Storage Locations.
  4. On the right, the four possible storage locations and their settings will be shown.
  5. By default the Alternate storage location is set to "rr:\OverflowData", which is an invalid drive.  To set this, double click on the Alternate storage location in the list, which will open the settings window.
  6. The Path can now be modified.  This should be set to a different hard drive than the Circular data location.  Ideally this would be a drive on the local computer, but could also be a network drive as the connection is reliable.
    1. If using a local drive you would enter the path to where this should be stored, for example E:\Historian\Data\Alternate.  If this folder does not exist on the hard drive, the software will create it.
    2. If using a network drive, the Wonderware Network User (Start > Programs > Wonderware > Common > Change Network Account) must have full access to this hard drive, and the drive must use a UNC path (Example \\MyOtherComputer\HistorianAlternate)
  7. Once this path has been set, you will need to commit the pending changes, or restart the Historian.