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Chapter 2. Connecting the controller unit to the loop
This chapter provides brief descriptions of the components that connect the controller unit
to the Fibre Channel Arbitrated Loop (FC-AL) and instructions for installing the interface
cables.
Mini-hub interface connections
The interfaces that connect the controller and drive enclosures to the storage subsystem
are called mini-hubs. When fully configured, the back of the controller unit can
accommodate four host mini-hubs and four drive mini-hubs. Each mini-hub is a
removable unit. A mini-hub provides the Fibre Channel interface between a controller and
hosts and drives. Each mini-hub has two ports. One Gigabit Interface Converter (GBIC)
connects into each mini-hub port; then, a host or drive fiber-optic cable connects into the
GBIC. The following figure shows the mini-hub interface connections.
Host mini-hub ports
interface cable
©
Copyright IBM Corp. 2000
Mini-hub
GBIC
Fiber-optic
Figure 13. Mini-hub interface connections
GBIC
Drive mini-hub
ports
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