View history blocks

You can view details, such as the start and end time, for history blocks.

To view history block information

1. In the Operations Control Management Console tree, expand a server group and then expand a server.

2. Expand Management Console and then select History Blocks. The history block information appears in the details pane.

   

   Column descriptions are as follows:

   Start Time

   The starting timestamp for the history block.

   End Time

   The ending timestamp for the history block.

   Location

   The path to the storage location. The circular storage location must be a local drive on the server, and the path must be specified using normal drive letter notation (for example, c:\Historian\Data\Circular). While the alternate, buffer, and permanent storage locations can be anywhere on the network, it is strongly recommended to have the alternate storage location configured on a dedicated physical drive locally attached by a high-speed interface to the Historian server or configured to be on a different internal hard drive. If you use a network location, the Historian computer's Configuration service account should have full access to that network path. The locations must be specified using UNC notation. Mapped drives are not supported.

   Duration

   The time span for the history block.

   TimeZone

   The time zone of the history block.

   UTC Bias

   The time offset from Coordinated Universal Time.

The data shown in the details pane is not automatically refreshed. To refresh the list from the history block information held by the Configuration Manager, right-click History Blocks in the console tree and then click Refresh. In most cases, this type of refresh is all that is needed.