Server disk storage

The main consumers of historical data in PO are:

  1. Advanced Reporting and Dashboards Module (PME) historical data for display in reports and dashboards.
  2. PO historical data stored for PO alarm viewer, trend viewer, and built-in basic reports.

Advanced Reporting and Dashboards data is stored in Microsoft SQL databases. PO data is stored in file system flat files (no SQL required).

Required disk space without Advanced Reporting

When planning a Power Operation system without Advanced Reporting (Power Monitoring Expert), you can fine tune your disk storage requirements based on how Power Operation stores data.

Power Operation has two major consumers of disk storage space:

  1. Alarm information which is stored in a propriety database that may grow over time to a size of 1-2 GB.
  2. Historical data stored in trend files (flat files on the disk) used by PO built-in reports and trend viewer. The size and number of these trend files depend on number of tags in system, logging interval, and number of years to store data.

Trend files are pre-allocated (reserved) on the hard disk the first time that Power Operation is started. Hard disk space does not "grow" over time by acquiring trend data. In other words, if the hard drive is not big enough for the number of years of trending that you plan for, the system will tell you.

Calculating disk storage

To calculate disk storage size for your system, use the Power Operation Disk Sizing Calculator. Go to the Schneider Electric Community for more information.

NOTE: These values include a 2 GB alarm database size and assume that you configure trends to be stored in separate files each week.