Administrator Guide

Using the Storage Summary Plugin
The Storage Summary plugin displays current storage usage in numerical and bar chart formats and historical storage usage in line chart
format.
Use the bar chart to compare the amount of used disk space to the amount of available disk space on a Storage Center. Use the line chart
to compare the historical used disk space to the historical available disk space and alert threshold.
Storage Summary Bar Chart
Use the bar chart to view available disk space, allocated disk space, used disk space, free disk space, and Savings vs RAID 10. In addition,
the amount of configured disk space and oversubscribed disk space is displayed below the bar chart.
The following information is displayed in the bar chart on the Storage Summary plugin:
Field/Option
Description
Configured Space Total amount of space available on all of the configured volumes in the Storage Center. Calculated as:
• Storage Center version 7.4.10—Configured space is equal Total space
• Storage Center version 7.2 and earlier, Configured space is equal to Available space
Oversubscribed Configured Space minus the Available Space.
Spare Space Amount of space distributed across all drives that is reserved for balancing drive usage and recovering from a
drive failure. (Displayed in Storage Center version 7.4.2 and later.)
Available Space Amount of space allocated for volumes and the free space that can be used by the Storage Center. Calculated as:
• Storage Center version 7.4.10—Used space + Free space
• Storage Center versions 7.3-7.4.2—Allocated + Free space
Free Space Amount of disk space available for use by a Storage Center. Calculated as:
• Storage Center version 7.4.10—Storage Type Free space + Disk Free space
• Storage Center versions 7.3-7.4.2—Free space is equal to Disk Free space
Used Space Amount of configured space used by the Storage Center plus RAID overhead.
Allocated Space Amount of disk space allocated on the disks for volumes plus RAID overhead. (Not used in Storage Center
versions 7.1 or 7.2).
Savings vs RAID
Ten
Amount of disk space saved by effective use of RAID 5/6 and/or Data Reduction compared to possible disk space
savings from RAID 10.
Historical Storage Usage
The following information is displayed about past disk space usage on the Historical Storage Usage plugin:
Field/Option
Description
Available Space Total amount of raw disk space available on all of the disks of a Storage Center.
Used Space Amount of disk space used by a Storage Center.
Alert Threshold Space Low disk space threshold for a Storage Center.
Manipulating the Storage Summary Chart or Graph
You can change the zoom level of the chart or graph, save it as an image, or print it.
Zoom in on an Area of the Chart or Graph
Zoom in if you want to view more details.
Steps
1. Click and hold the right or left mouse button.
2. Drag the mouse to the right to select.
3. Release the mouse button to zoom into the selected area of the bar chart.
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Viewing Storage Center Information