Dell PowerVault MD3820f - Manual (Page 42)

4. To confirm, click OK.
To indicate that background performance monitoring is in progress, the Start link changes to Stop,
and the system shows an In Progress icon next to the Stop link.
NOTE: For accurate data, do not change the system date or time while using background
performance monitor. If you must change the system date, stop and restart the background
performance monitor.
5. To manually stop background performance monitoring, click the Stop link.
Background performance monitoring automatically stops when you close the Enterprise
Management Window (EMW). Background performance monitoring also might stop when you start a
firmware download. You are prompted to save the background performance monitoring data when
this happens.
NOTE: When you close the EMW, you might be monitoring more than one storage array.
Performance data is not saved for any storage array that is in the Unresponsive state.
A dialog appears asking you whether you want to save the performance data.
6. Do you want to save the current Performance Monitor data?
– Yes – Click Yes, select a directory, enter a filename, and then click Save.
– No – Click No.
7. To close the View Current Background Performance Monitor dialog, click Close.
Viewing Information about the Current Background Performance Monitor
Session
Before performing this task make sure that the background performance monitoring is in progress. You
can tell that background performance monitoring is in progress by the presence of the In Progress icon
next to the Stop link in the View Current Background Performance Monitor dialog.
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 appears.
3. Hold the pointer over the Stop link.
A tooltip appears displaying the time background performance monitoring was started, the length of
time background performance monitoring has been in progress, and the sampling interval.
NOTE: For an accurate elapsed time, do not use the Synchronize RAID controller module
Clocks option while using Performance Monitor. If you do, it is possible for the elapsed time to
be negative.
Viewing Current Background Performance Monitor Data
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.
When the metric value exceeds 99,999, it appears in thousands (K), beginning with 100K until the number
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