VSP Port Usage Test

This test provides information on I/O rates for all the host bus adapters connected to each Storage unit Port.

Target of the test : A Hitachi VSP storage device

Agent deploying the test : A remote agent

Outputs of the test : One set of results for every port on the target Hitachi VSP device being monitored

The figure below depicts the test configuration page of this test. Click on the parameters in the figure below to know what they are and how to configure them.

Measures made by the test:
Measurement Description Measurement Unit Interpretation

I/O operations rate:

Indicates the rate at which read-write operations are performed on this port.


A high value of this measure is generally indicative of high I/O activity on a port. Comparing the value of this measure across ports will enable you to isolate busy ports, and detect load imbalances.

Data traffic:

Indicates the rate at which data is transferred over this port.



Response time:

Indicates the responsiveness of this port to read-write requests.


Ideally, the value of this measure should be low. If the value of this measure is very high or is increasing steadily, then, you might want to check whether the I/O operations rate measure too reports a high value. If so, it is a clear indication that since the I/O activity is high, the hosts are taking a longer time to access the disks, thereby increasing the response time.