HP Storage Essentials SRM 6.0 User Guide for Enterprise Edition and Standard Edition SRM Software (July 2008)

HP Storage Essentials SRM 6.0 User Guide 369
9. Click the button to update the chart.
10.To print the chart, click the button displayed in the same pane as the chart.
Viewing Trending Information for Storage Capacity
The management server can display trending information in its reports. For example, you can
configure Capacity Manager to display trending information for the next week. This information can
give you an indication of an element's future capacity need based on its past capacity utilization.
Keep in mind the following:
• An element's capacity can drastically change in the future. Keep in mind that the data trends are
just assumptions and should not be treated as fact.
• Trending requires at least two sets of data gathered within the frequency specified.
To view trending information:
1. Access Capacity Manager as described in ”Accessing Capacity Manager” on page 357.
2. Click the element whose performance history you want to see.
3. In the bottom pane, click the Chart tab.
4. In the lower-middle split pane, click a monitoring option.
5. In the pane displaying the chart, enter a number in the Trend box.
The number corresponds to the number of frequency intervals for which the trending information
will be provided. For example, if you enter 5 in the Trend box, the chart provides trending
information for five frequency intervals, such as five weeks if weeks was selected from the
Frequency menu.
6. Click the button.
The trending information is displayed.
NOTE: If there is not enough data to display, Capacity Manager does not display the chart. For
example, if you selected the weekly option from Frequency menu, and you have only two days of
data, a chart is not displayed, regardless of the value in the Trend box. Capacity Manager does not
display a chart if there is not enough data, and the trending number is ignored.
Different Results for the df -k Command and Capacity Manager
If you run the df -k command on UNIX for a storage system, you may notice that the total capacity
displayed does not match the total capacity in Capacity Manager. This difference occurs because
Capacity Manager calculates the total capacity differently than the df -k command. The df -k
command calculates the total capacity as follows:
used capacity + available capacity + reserved capacity
Capacity Manager calculates the capacity as follows:
used capacity + available capacity