HP StorageWorks 64 FW 05.01.00 and SW 07.01.00 HP StorageWorks Embedded Web Se - Page 110
Performing Diagnostics on Ports, Operations, Diagnostics, Internal loopback test
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Operating and Managing Products and Parts Performing Diagnostics on Ports Choose Operations from the navigation panel. Choose the Port tab and the Diagnostics tab; the Diagnostics tab view displays (Figure 39). Use this view to run either internal or external loopback diagnostic tests for any port. (Service personnel may request these tests to be conducted to aid in troubleshooting problems.) ■ Internal loopback test - an internal loopback test checks internal port, serializer, and deserializer circuitry. ■ External loopback test - an external loopback test checks all port circuitry, including fiber optic or copper components. Figure 39: Performing diagnostics on ports To run these tests, make sure that the administrator for any device attached to the ports quiesces Fibre Channel frame traffic through the product and sets the attached devices offline. A message will display in the status area to notify you that device applications should be terminated before starting diagnostics. However, since these tests disrupt port operation, make sure that there are no active nodes connected to the port(s) before starting a test. A loopback plug, furnished with the product, is required for the external loopback test. 110 Embedded Web Server User Guide