Product manual

Chapter 8: Troubleshooting
407
If VTrak sees some initiators but not the one you want, the problem is most likely
elsewhere in the loop or fabric. If VTrak does not see any initiators:
• Check all of the Fibre Channel connections
• Verify that all nodes are properly connected and powered
• Verify that the fabric router or switch is properly connected powered
For more information, see “Managing Fibre Channel Connections” on page 184
or page 252.
SAS Connections
Faulty SAS expansion connections are suspected when the link port counter
reports a large number of bad link errors. See the VTrak Jx10s or Jx30s Product
Manual for more information.
Link errors can be caused by:
• Debris blocking the SAS cable connector
• A faulty SAS cable
• A faulty controller or I/O module SAS connector
Blocked Cable Connectors
To check for debris blocking the SAS cable connector:
1. Power down the RAID subsystem and JBOD units.
2. Remove the SAS cable and check all SAS connectors for debris.
3. Clean the connectors as required and reconnect the SAS cable.
4. Power up the subsystems and monitor the link port counter for changes in
the rate of link error accumulation.
Faulty Cable
To check for a faulty SAS cable:
1. Power down the RAID subsystem and JBOD units.
2. Replace the SAS cable with a new one.
3. Power up the subsystems and monitor the link port counter for changes in
the rate of link error accumulation.
Faulty Controller or I/O Module Connector
To check for a bad controller or I/O module SAS connector:
1. With the subsystems online and I/Os running, access the CLI via serial or
Telnet.
See “Initial Connection” on page 206.
2. At the command prompt, type the following command and press Enter.