HP StorageWorks 4000 Compaq StorageWorks Fibre Channel Troubleshooting Guide - Page 35

Display of a FC-AL with a Missing Fibre Channel Tape Controller

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Fibre Channel Fault Isolation Utility 2-5 Display of a FC-AL with a Missing Fibre Channel Tape Controller The figure below shows a Fibre Channel Host Bus Adapter highlighted with a Fibre Channel Tape Controller missing. This indicates that while the Tape Controller has become inactive on the FC-AL since the utility was started. This could mean that it has been physically disconnected or that errors are occurring on the FC-AL at a great enough frequency to prevent the device from maintaining login. If there are a large number of errors occurring in the FC-AL, the Fibre Channel Host Bus Adapter may not be able to communicate with the Fibre Channel Tape Controllers on the FC-AL. In this case, the Fibre Channel Controllers may appear to be offline in the program, although in reality they are physically connected to the FC-AL. When a FC-AL shows errors, the Fibre Channel Array and Tape Controllers may alternate between being logged-on the FC-AL or missing. Figure 2-4. Display of a FC-AL with two Fibre Channel Tape Controllers shown as missing

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Fibre Channel Fault Isolation Utility
2-5
Display of a FC-AL with a Missing Fibre Channel Tape Controller
The figure below shows a Fibre Channel Host Bus Adapter highlighted with a Fibre Channel
Tape Controller missing. This indicates that while the Tape Controller has become inactive on
the FC-AL since the utility was started. This could mean that it has been physically
disconnected or that errors are occurring on the FC-AL at a great enough frequency to prevent
the device from maintaining login.
If there are a large number of errors occurring in the FC-AL, the Fibre Channel Host Bus
Adapter may not be able to communicate with the Fibre Channel Tape Controllers on the
FC-AL. In this case, the Fibre Channel Controllers may appear to be offline in the program,
although in reality they are physically connected to the FC-AL. When a FC-AL shows errors,
the Fibre Channel Array and Tape Controllers may alternate between being logged-on the
FC-AL or missing.
Figure 2-4.
Display of a FC-AL with two Fibre Channel Tape Controllers shown as missing