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Host mini-hubs
Controller A
1
Host mini-hub
ports
Drive mini-hubs
Each drive mini-hub connects to Controller A and Controller B and each drive mini-hub
represents a single drive channel. The drive channels are set up in pairs to support
redundant drive loop configurations (two data paths per drive enclosure). Each pair
supports up to 11 drive enclosures, containing 10 drives each, or a maximum of 110
drives. A fully configured controller unit supports a maximum of 22 drive enclosures
(11 drive enclosures per channel pair), or 220 drives.
Important: These large configurations are for capacity purposes and might not provide
the best performance.
The drive channel cables connect to GBICs, which connect to either the upper or lower
port on each mini-hub. Leave the remaining port on each mini-hub unoccupied for future
upgrades, as shown in
Controller A
Controller B
Controller B
Controller A
Controller B
3
4
2
Figure 15. Controller unit host mini-hubs
Figure 16 on page
26.
Chapter 2. Connecting the controller unit to the loop
Front view
Back view
25
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