Notes
■When inserting a loopback connector into the T Port, there will be NO green light indicating a proper insertion. However, the test will run and be valid. There is currently an RFE to address this issue.
■ If only one of the links has failed and the I/O is travelling over the remaining link, once the failed link is replaced and recabled, I/O will be automatically be routed over the repaired link by the switch. No manual intervention is required.
■If both links have failed and a LUN failover has occured, after repairing the links
and recabling them, the user will have to manually perform a ’mpdrive failback’ to return the paths to their optimal state. I/O will then resume as normal over the T Ports.
T1/T2 Isolation Procedures
1.Run linktest from the Storage Automated Diagnostic Environment for a guided isolation procedure.
2.After replacing the failed FRU, run mpdrive failback, if needed.
108 Sun StorEdge 3900 and 6900 Series Troubleshooting Guide • March 2002
