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3ware® CLI Guide > CLI Syntax Reference > Controller Object Commands > /cx set dpmstat=on|off

/cx set dpmstat=on|off
This command applies only to 9000 series SX/SE/SA controllers.
This command allows you to enable or disable the Drive Performance Monitor (DPM).
By setting dpmstat to on you can enable the gathering of statistics for drives when I/O is running. These statistics can be helpful when troubleshooting performance problems.
You can see whether the Performance Monitor is currently running and display a statistics summary by using the command /cx show dpmstat [type=inst|ra|ext].
For a description of each of the statistics that can be gathered and viewed, see /cx/px show dpmstat type=inst|ra|lct|histdata|ext.
DPM is disabled by default since there is overhead in maintaining the statistics. DPM is also disabled following a reboot or power-on.
Note that turning off DPM does not clear the statistical data that has been recorded. To clear the data, use the command /cx/px set dpmstat=clear [type=ra|lct|ext].
For more information, see Drive Performance Monitoring of the 3ware SAS/SATA RAID Software User Guide, Version 9.5.1.
Example:
 //localhost> /c0 set dpmstat=off
 Setting Drive Performance Monitoring on /c0 to [off]... Done.

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