Troubleshooting PowerHA SystemMirror clusters

The following sections present the recommended troubleshooting strategy for a PowerHA® SystemMirror® cluster. It describes the problem determination tools available from the PowerHA SystemMirror main SMIT menu. This guide also includes information on tuning the cluster for best performance, which can help you avoid some common problems.

Typically, a functioning PowerHA SystemMirror cluster requires minimal intervention. If a problem does occur, diagnostic and recovery skills are essential. Therefore, troubleshooting requires that you identify the problem quickly and apply your understanding of the PowerHA SystemMirror software to restore the cluster to full operation.

In general, troubleshooting a PowerHA SystemMirror cluster involves:

• Becoming aware that a problem exists
• Determining the source of the problem
• Correcting the problem.