Compaq StorageWorks Fibre Channel Troubleshooting Guide

Introduction 1-9
Storage Hub 12
The Storage Hub 12 continuously monitors and automatically configures devices added or
removed from the FC-AL. Adding valid FC-AL nodes is a plug-and-play operation. FC-AL
nodes that are missing or inoperative are detected, and the data is automatically routed to the
next operational port and node on the FC-AL.
The Storage Hub 12 is transparent to the data passing through it. It does not consume any
FC-AL addresses. Because of the intelligent signal detection tests, only valid Fibre Channel
devices will be connected to the FC-AL. When devices are added to the FC-AL, the Storage
Hub 12 will automatically test the new device and accept it into the FC-AL. Faulty devices will
be dropped by the Storage Hub 12 and dynamic node addressing will maintain the overall
FC-AL integrity.
Figure 1-8. Compaq Fibre Channel Storage Hub 12
Features
■ Expandability and Performance—supports 12 GigaBit Interface Converter modules
■ Flexibility—adheres to the ANSI FC-AL standard
■ Intelligent Port Control—provides multiple data checks without affecting performance
■ Ease of Use—provides port-bypass circuitry flexibility and simplifies central wiring
management