Administrator Guide

4. You can save the file in the default location with the default filename that uses the name of the storage array and a timestamp. You
can also select a location, enter a filename, and then click Save.
The file is saved as a comma-separated values file with a default extension of .csv. You can open a comma-separated values file with
any spreadsheet application. Your spreadsheet application might have a limit on the number of rows a file can have.
Viewing saved background performance monitor data
The physical disk or network location that contains the saved performance data file, must contain some free space, otherwise the file will
not load. A background performance monitor graph plots a single performance metric over time for up to five objects. The x-axis of the
graph represents time. The y-axis of the graph represents the metric value. The metric value is displayed in thousands (K), when the value
exceeds 99,999, starting with 100 K until the number reaches 9999 K, then the value is displayed in millions (M). For amounts greater than
9999 K but less than 100 M, the value is displayed in tenths (for example, 12.3 M).
1. In the Array Management Window (AMW), click the Performance tab.
2. Click the Launch background performance monitor link.
The View Current Background Performance Monitor dialog is displayed.
3. Click the Launch saved background performance monitor link.
The Load Background Performance dialog is displayed.
4. Navigate to the .csv file that you want to open, and then click Open.
The View Saved Background Performance Monitor dialog opens.
5. In the Select metric drop-down list, select the performance data that you want to view.
You can select only one metric at a time.
6. In the Select an object(s) list, select the objects for which you want to view background performance data.
You can select up to five objects to monitor on one graph. Use Ctrl-Click and Shift-Click to select multiple objects. Each object is
plotted as a separate line on the graph. The graph shows all of the data points in the saved file.
NOTE: If you do not see a line that you defined on the graph, it might be overlapping another line.
7. (Optional) To change the time period plotted on the graph, make selections in the Start Date, Start Time, End Date, and End Time
drop-down lists.
8. To close the dialog, click Close.
Invalid objects in Performance Monitor
When viewing a performance graph, you might see objects marked with an asterisk (*). An asterisk indicates that the object is no longer
valid. When an object becomes invalid, the performance graph contains missing data points. The data that was collected before the object
became invalid is still available for viewing.
If the invalid object returns, the Performance Monitor resumes collecting data for the object.
If the invalid object represents a deleted object, its performance graph no longer updates. When this event happens, you should redefine
the graph to monitor a valid object.
Invalid objects can be caused by a number of factors:
• The virtual disk was deleted.
• The virtual disk was unmapped.
• A disk group that is being imported.
• The RAID controller module is in simplex mode.
• The RAID controller module is offline.
• The RAID controller module failed.
• The RAID controller module was removed.
• The physical disk failed.
• The physical disk was removed.
It is possible to have two objects with the same name. Two virtual disks can have the same name if you delete a virtual disk and then later
create another virtual disk with the same name. The original virtual disk’s name contains an asterisk indicating that the virtual disk no
longer exists. The new virtual disk has the same name, but without an asterisk. Two physical disks will have the same name if you replace a
physical disk. The original physical disk’s name contains an asterisk indicating that it is invalid and no longer exists. The new physical disk
has the same name without an asterisk.
About your MD Series storage array
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