Installation guide

48 Chapter 2:Hardware Installation and Operating System Configuration
Setting Up a Fibre Channel Interconnect
Fibre Channel can be used in either single-initiator or multi-initiator configurations
A single-initiator Fibre Channel interconnect has only one cluster system connected to it. This may
provide better host isolation and better performance than a multi-initiator bus. Single-initiator inter-
connects ensure that each cluster system is protected from disruptions due to the workload, initializa-
tion, or repair of the other cluster system.
If employing a RAID array that has multiple host ports, and the RAID array provides simultaneous
access to all the shared logical units from the host ports on the storage enclosure, set up two single-
initiator Fibre Channel interconnects to connect each cluster system to the RAID array. If a logical
unit can fail over from one controller to the other, the process must be transparent to the operating
system.
Figure 2–8, Single-Controller RAID Array Connected to Single-Initiator Fibre Channel Interconnects
shows a single-controller RAID array with two host ports, and the host bus adapters connected directly
to the RAID controller, without using Fibre Channel hubs or switches.
Figure 2–8 Single-Controller RAID Array Connected to Single-Initiator Fibre
Channel Interconnects