Introduction › How to Analyze and Lower DASD Costs › Identify Data Set Organization Groups Containing Excess DASD Capacity

Identify Data Set Organization Groups Containing Excess DASD Capacity

As a storage administrator, you want to identify the data set organization groups containing excess DASD capacity so you can reduce excess DASD capacity and your costs of wasted unused DASD space. Doing so can save your company money.

Follow these steps:

1. Expand the Cost Analysis, Base System Analysis directory in the Storage object tree of the Investigator, and open the Current Base Analyses object.

   This object shows quantitative values for the same analytical scenarios displayed in the Current Analyses object which primarily shows financial values.

2. Click anywhere in the row besides the check-box in the row How much excess unused DASD capacity is being maintained? and click the Details tab.

   The details of the Final Result value calculation are displayed. The Final Result value is the total amount of excess DASD capacity in Gigabytes.

3. Click the Synopsis tab to see how the value is calculated.

   The synopsis tells you that this scenario analyzes the current DASD free-space relative to the overall DASD and compares that to the DASD free-space padding goal for your local site (DASD free-space padding).

4. Click anywhere in the row besides the check-box in the severity two row, to display actions and details for it.
5. Review the values in the Details tab to see the details of the Final Result value calculation. Items that need your attention have colored backgrounds, where a red background highlights the items that have the highest values outside your target limits.
6. Click the Recommendations tab to see the recommendation of what you should do to improve your storage resource allocations.

   If the scenario How much excess unused DASD capacity is being maintained? has a severity one grading, the recommendation suggests you free-up over allocated space in one or more of your data set organization groups.

7. (Optional) Investigate historical analysis by reviewing the Historical Analyses and Historical Base Analyses objects. These objects show the history of the same scenarios of the Current Analyses and Current Base Analyses. These objects can help you identify your historical costs and amounts of wasted DASD space wasted by over-allocated data sets.
8. Select the Navigational action Show Synopsis in the Actions pane or the Synopsis tab at the bottom of the table pane, to see a summary of the major points of the selected analytical scenarios.

   You have identified the data set organization groups that contain excess DASD capacity so you know the groups from which you can reduce unused space.