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STA User Interface Guide, v1.0.2
E28380-03
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Using STA to Answer Tape Environment Questions : Capacity and Resource Management Questions : ▼ Report Shortages or Surpluses of Media

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Report Shortages or Surpluses of Media

This procedure addresses the questions, “Which type of media am I the shortest on? Do I have an oversupply of any type?”

The definition of media “available for writing” varies by site. For example, a site that does not re-use cartridges may simply compare total versus available capacity for each type of media; another site that does re-use cartridges may look at some “media life” measure instead. Both of these measures, and others, are available within STA. This procedure uses total versus available capacity.

Referenced Tasks

•
“Apply a Template”
•
“Use the Filter Data Dialog Box to Change a Table Filter”
•
“Sort by Multiple Columns”
•
“Move a Column”
•
“Export Table Data to a Spreadsheet”
1.
In the Navigation Bar, select Media > Overview.

2.
In the Templates menu, select the “STA-Media-Utilization” template.

This template includes all the attributes related to utilization, such as “Media Dismounts (30 Days)”, “MB Read (30 Days)”, and “Media Life Indicator”.

3.
Use the following steps to eliminate any media for which capacity or availability information is not available.

The longer STA monitors the libraries, the more exchange data it receives, and the lower the overall uncertainty level.

a.
Click Filter Data.
b.
In the “Media MB Capacity” field, select “Greater Than” and enter “0”.
c.
Click Apply.

4.
Note the number of records eliminated, since it reflects the level of uncertainty.

In the example below, the number of records goes from 623 to 349, indicating a high uncertainty level. This library has been monitored for only a few days.

5.
For the media in the resulting list, use the following steps to display the capacity and space available for each piece of media displayed.
a.
Select View > Sort > Advanced.
b.
Complete the Advanced Sort dialog box as follows:
•
In the “Sort By” menu, select “Media Type”.
•
In the first “Then By” menu, select “Media MB Avail Pre”.
•
In the second “Then By” menu, select “Media MB Avail Post”.

Note – LTO drives report “Media MB Avail Pre” and StorageTek enterprise drives report “Media MB Avail Post”. Sorting on both attributes allows you to capture all drive types.

c.
Click OK.

The table is sorted according to your criteria.

6.
To better view the capacity data together on the screen, use the following steps to reorder the table columns.
a.
Select View > Reorder Columns.
b.
In the Reorder Columns dialog box, arrange the following attributes so they are listed together.
•
Media Type
•
Media MB Capacity
•
Media MB Avail Pre
•
Media MB Avail Post
c.
Click OK.

The table columns are reordered according to your criteria.

7.
To calculate the total capacity and space available for each media type, you must use an external spreadsheet application. Use the following steps to export the data displayed in the table to an HTML-based Excel-compatible file.
a.
Click the Export icon in the Table Toolbar.

b.
Save the file to a location on your local computer.
8.
Use a compatible spreadsheet application to open the file and summarize the data. For example, you may want to calculate totals, percentages used, or averages by media type.
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