Use the following general guidelines when diagnosing a DFS problem:
1. When a problem occurs, determine the event sets related to the problem and set their states to active using the dfstrace setset command. Messages from multiple event sets are indistinguishable from each other if they are written to a single log; therefore, by disabling event sets whose events are unrelated to a problem, you can more easily diagnose that problem.
2. If a problem is reproducible, clear the appropriate logs with the dfstrace clear command and reproduce the problem. If the problem is not easily reproduced, keep tracing enabled until the problem recurs.
3. Dump the appropriate logs using the dfstrace dump command.
Note: When you are not diagnosing problems, set all event sets to the dormant state using the dfstrace setset command. When tracing is enabled, system performance is affected.