HP StorageWorks 2000 Series Reference Manual page 144

To illuminate an enclosure LED to help you visually locate the enclosure:
1. Select Manage > General Config > Enclosure Management.
2. If there is more than one enclosure, select the enclosure to locate.
3. Click Illuminate Locator LED.
To stop illuminating an enclosure LED:
1. Select the enclosure.
2. Click Turn Off Locator LED.
You can change the interval at which the storage system polls the EC (EMP) for
status changes. Typically, use the default rate.
Increasing the interval might slightly improve processing efficiency, but changes
in device status are communicated less frequently. For example, this increases the
amount of time before LEDs are updated to reflect status changes.
Decreasing the interval slightly decreases processing efficiency, but changes in
device status are communicated more frequently. For example, this decreases the
amount of time before LEDs are updated to reflect status changes.
To change the enclosure polling rate:
1. Select Manage > General Config > Enclosure Management.
2. In the Advanced Enclosure Options panel, click Advanced Options.
3. Change the polling rate.
The default is 5 seconds.
4. Click Change EMP Poll Rate.