Restoring Archives with Historian

About this task

CAUTION: Restoring an archive is a resource-intensive operation and should be scheduled for non-peak usage times.
Warning: Never restore an archive to a production Historian server without a current archive already online.

Under certain circumstances, you may want to restore tag and alarms and events data to Historian. This may be after an unplanned shutdown, or you may need to retrieve data from an old, inactive archive.

Before restoring an archive from a removable disk, copy the archive file to the normal archive path and then restore the archive from that location. Leave the original backup file in the backup file folder.

Archives that have been previously removed from Historian can be found in the \Archives\Offline directory.

Procedure

  1. Open Windows Explorer.
  2. Locate the backup archive file and copy the file to the Default Archive path.
  3. Access the Data Store Maintenance page.
  4. Select Restore An Archive From Backup . The Restore Archive window appears.
  5. In the Archive Name field, enter the name of the archive you want to restore.
  6. Specify the location of the Archive file.
    • Enter the pathname of the archive from a local drive, or specify a UNC path, OR
    • Browse to the file location and select a single archive file or multiple archive files in the File Location Field.
  7. Verify that the filename and path are correct.
  8. Select Configured Data Store from the drop-down list box to restore the archive to the data store specified within the archive file.
    If Historian is unable to find the correct data store to load this file to, then it will be loaded to the default data store.
  9. Select OK.
    The restored archive is moved to the \Archive directory and is made available for querying.