3. Repeat steps 1 on page 53 and 2 on page 53 for an additional redundant host
connection. In a direct connection configuration, you can create a maximum of
two redundant host connections for the storage subsystem.
See “Direct-attached single-controller connections” and “Direct-attached
dual-controller connections” on page 56 for illustrations of host connections.
For examples of redundant, partially-redundant, and non-redundant host and drive
loop configurations, see “Fibre Channel host loop configurations” on page 57.
Direct-attached single-controller connections: The following illustration shows a
direct-attached connection to a single host HBA.
The following illustration shows a direct-attached connection to dual HBAs in a
single host (redundant host connection).
Serial port
Ethernet ports
SAS host port 1
SAS host port 2
Fibre channel host port 3
Controller A
Fibre channel host port 4
Fibre channel host port 5
Fibre channel host port 6
Drive expansion port
Seven-segment
numeric display
Controller B
Figure 48. Location of host connectors on RAID controllers
Host system
with single host
adapter
DS3500
Figure 49. Single-controller direct-attached Fibre Channel connection to a single host HBA
54 System Storage DS3500 and EXP3500: Installation, User’s, and Maintenance Guide
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