HP MSA 1040 SMU Reference Guide (762784-001, March 2014)

Resetting or saving historical disk-performance statistics 91
Resetting or saving historical disk-performance statistics
Resetting historical disk-performance statistics
You can reset (clear) all historical performance statistics for all disks. When you reset historical statistics, an event will
be logged and new data samples will continue to be stored every quarter hour.
To reset historical disk performance statistics
1. In the Configuration View panel, right-click the local system and select Tools > Reset or Save Disk Performance
Statistics.
2. In the main panel, under the Reset Disk Performance Statistics heading, click Reset. A confirmation dialog
appears.
3. Click Yes to continue; otherwise, click No. If you clicked Yes, a processing dialog appears. When processing is
complete a success dialog appears.
4. Click OK.
Saving historical disk-performance statistics
You can download historical disk-performance statistics for all disks in the storage system. This task downloads the
data in CSV format to a file, for import into a spreadsheet or other third-party application.
The number of data samples downloaded is fixed at 100 to limit the size of the data file to be generated and
transferred. The default is to retrieve all the available data (up to six months) aggregated into 100 samples. You can
specify a different time range by specifying a start and end time. If the specified time range spans more than
100 15-minute samples, the data will be aggregated into 100 samples.
The resulting file will contain a row of property names and a row for each data sample, as shown in the following
example. For property descriptions, see the topic about the disk-hist-statistics basetype in the CLI
Reference Guide.
"sample-time","durable-id","serial-number","number-of-ios", ...
"2012-01-18 01:00:00","disk_1.1","PLV2W1XE","2467917", ...
"2012-01-18 01:15:00","disk_1.1","PLV2W1XE","2360042", ...
...
To save historical disk-performance statistics
1. In the Configuration View panel, right-click the local system and select Tools > Reset or Save Disk Performance
Statistics.
2. In the main panel, under the Save Disk Performance Statistics heading, specify start and end dates and times to
define the range of performance data to retrieve.
3. Click Save.
NOTE: In Microsoft Internet Explorer if the download is blocked by a security bar, select its Download File
option. If the download does not succeed the first time, return to the Reset or Save Disk Performance Statistics
panel and retry the save operation.
4. When prompted to open or save the file, click Save.
• If you are using Firefox and have a download directory set, the file Disk_Performance.csv is saved there.
• Otherwise, you are prompted to specify the file location and name. The default file name is
Disk_Performance.csv. Change the name to identify the system, controller, and date.