You can test the communication link to diagnose possible communication problems between the local storage system and the remote storage system associated with a mirror consistency group.

Before you begin

The mirror consistency group that you want to test must exist on the local and remote storage systems.

About this task

You can run four different tests:

Connectivity
Verifies that the two controllers have a communication path. The connectivity test sends an inter-array message between the storage systems, and then validates that the corresponding mirror consistency group on the remote storage system exists. It also validates that the member volumes of the mirror consistency group on the remote storage system match the member volumes of the mirror consistency group on the local storage system.
Latency
Sends a SCSI Test Unit command to each mirrored volume on the remote storage system associated with the mirror consistency group to test the minimum, average, and maximum latency.
Bandwidth
Sends two inter-array messages to the remote storage system to test the minimum, average, and maximum bandwidth as well as the negotiated link speed of the port on the array performing the test.
Port connections
Shows the port that is being used for mirroring on the local storage system and the port that is receiving the mirrored data on the remote storage system.

Steps

Select Storage > Asynchronous Mirroring.
Select the Mirror Consistency Groups tab, and then select the mirror consistency group that you want to test.
Select Test Communication.

The Test Communication dialog box appears.
Select one or more communication tests to perform between the local and remote storage systems associated with the selected mirror consistency group, and then click Test.

Review the information displayed in the Results window.

Communication Test Status	Description
Normal with no errors	The mirror consistency group is communicating correctly.
Passed status (but not normal)	Check possible network or connection problems and retry the test.
Failed status	The reason for the failure is indicated. Refer to the Recovery Guru to correct the problem.
Port connection error	The reason may be that the local storage system is not connected or the remote storage system cannot be contacted. Refer to the Recovery Guru to correct the problem.

Communication Test Status

Description

Normal with no errors

The mirror consistency group is communicating correctly.

Passed status (but not normal)

Check possible network or connection problems and retry the test.

Failed status

The reason for the failure is indicated. Refer to the Recovery Guru to correct the problem.

Port connection error

The reason may be that the local storage system is not connected or the remote storage system cannot be contacted. Refer to the Recovery Guru to correct the problem.

Results

After the communication test completes, this dialog box shows a Normal status, a Passed status, or a Failed status.

If the communication test returns a Failed status, the test continues to run after you close this dialog box until communication between the mirror consistency groups is restored.