Adding, Backing up and Restoring Archives

You may need to add an archive when the current archive is nearly full and you have not enabled automatic creation of archives. You may need to restore an archive when you start up after an unplanned shutdown or when you need to retrieve data from an old, inactive archive. You may need to backup and archive before a planned Historian software product upgrade.

Adding Archives

Important: If you plan to create multiple archives at the same time, then you must set the following parameters. These parameters apply only when creating multiple archives at the same time.
  • In the Details Tab, set File Attribute to Read/Write.
  • In the Global Options Tab:
    • Set Maximum Query Time (seconds) to 60 seconds.
    • Set Maximum Query Intervals to 100000 intervals.
    • Set Automatically Create Archives to Disabled.
    • Set Overwrite Old archives to Enabled.
    • Set Maintain Auto Recovery Files to Enabled.
    • Set Store OPC Quality to Disabled.
  • In the Security Tab:
    • Set Data is Readonly After (Hours) to 1 month.
    • Set Security Groups to use local.
    • set Generate Message on Data Update to Disabled.
    • set Require Point Verification to Disabled
CAUTION: If you are creating multiple archives on a remote machine, then you must ensure that you have enough hard disk space on that machine. The Allocate Space slider does not display a remote machine's hard disk space. In other words, if you are creating multiple archives on a remote machine, you must ignore the r;percentage of available disk space will be usedmessage displayed by the Allocate Space slider.

If you receive the error message r;Runtime error 330 Invalid Property Value" while creating multiple archives on a remote machine, it is probably because you do not have enough hard disk space on that machine. When you click OK on the error message, Historian Administrator may disappear. You must now clean up the remote machine's hard disk space and restart the Historian Administrator.

Note: Historian now supports maximum Archive Size of 256 GB per archive.