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Controller A
Host 1
Host 1
HA2
HA1
Host 2
Host 2
HA1
HA2
Host 3
HA1
Host 3
HA2
Connecting hosts using external devices
Use this procedure to connect five or more hosts to the controller unit. Using external
managed hubs, the controller unit supports up to 32 hosts (64 host adapters) per controller
or up to 64 hosts (128 host adapters) for redundant controllers. Before starting, make sure
to connect each host to its respective mini-hub.
Important: Host mini-hub 1 and host mini-hub 3 correspond to Controller A (top). Mini-
hub 2 and mini-hub 4 correspond to Controller B (bottom). To ensure
redundancy, connect each host to both controllers. You can use either the
upper or lower connectors on either mini-hub.
Note: Throughout this book, the use of hub or external hub refers to a managed hub.
36
IBM Netfinity FAStT500 RAID Controller Enclosure Unit Installation Guide
Controller A
Controller B
Controller B
Controller A
1
2
3
4
Figure 23. Connecting hosts directly to the controller
Controller B
Host 4
HA1
Host 4
HA2
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