Fujitsu IRF-1S series User Manual page 44

Chapter 2 - Topologies and Operating Modes
Multi-Port Mirrored SAN Attach Single Switch Connection
This SAN topology provides another robust high-performance active-active RAID
storage solution for multiple host systems with dual fibre ports.
It has the following advantages: system level fault-tolerance, high access,
high-performance, shared storage, and a lower cost to deploy then the multiple
switch configuration.
Its disadvantages are a SAN heterogeneous environment software or volume
management for homogenous environment software to effectively manage it.
In this topology the Host I/O card switch 1, 2, and 6 are set to the "Up" position.
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Multi-Port Mirrored SAN Attach Single Switch Connection
Host/Server (Node A)
FC HBA 1
H1
Right Host I/O Card
Failover
Circuit
Port 0 (P0) Port 1 (P1)
Active
Controller 0 (C0)
Duplex Mode Logical View - Multi-Port Mirrored SAN Attach Single Switch Connection
Switch 1 sets the bus speed mode on the Host I/O card to 2 GB/sec.
Switch 2 configures the enclosure for the imageRAID Controller.
Switch 6 enables automatic internal hub failover during a controller failure.
Switch
H0
Active
Host/Server (Node B)
FC HBA 1
H1 H0
Left Host I/O Card
Failover
Circuit
Port 0 (P0) Port 1 (P1)
Active Active
Controller 1 (C1)