Dell PowerVault MD3220 Owner's Manual page 56

5 Click Start.
Values appear for the selected storage arrays in the Performance Monitor
data table. The table is updated at the interval specified in the Polling
Interval setting.
6 Click Update to force an immediate poll of the storage array.
7 Click Stop to stop monitoring the storage array.
8 Click Save As on the Performance Monitor main dialog to save the
currently displayed performance statistics.
9 Select an appropriate directory.
10 Type a file name in the File name text box.
NOTE:
11 Select a file type from the Files of type list.
• Use the Report format (ASCII text) file type if you want to save the
data to a report form for viewing or printing.
• Use the Comma Delimited Format file type if you want to save the
data in a form that can be imported into a commercial spreadsheet
application for further analysis. Most leading commercial spreadsheet
applications recognize a comma delimiter. These applications use the
delimiter to import the data into spreadsheet cells.
12 Click Save.
The Performance Monitor data provides information about how your storage
array is performing. The data is presented in eight columns, which are
described in this table. Use this data to make performance tuning decisions
for your storage array.
Table 4-3. Performance Monitor Table Description
Column Headings
Devices
Total IOs
Read Percentage
Cache Hit Percentage
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Planning: MD3200 Series Storage Array Terms and Concepts
The .perf extension is the default.
Description
Controller, virtual disk or storage array total.
Cumulative IO's per second from last start time.
Percentage of cumulative IO's that are READs.
Percentage of cumulative IO's that are in-cache.