Fujitsu IRF-1S series User Manual page 45

Multi-Port Mirrored SAN Attach Dual Switch Connection
This SAN topology provides the most robust high-performance active-active RAID
storage solution for multiple host systems with dual Fibre ports.
It has the following advantages: full solution level fault-tolerance, high access,
high-performance, redundant switches, supports upstream path failover, no
single point of failure when using clustering and path failover software, and it
provides shared storage.
Its disadvantages are the requirement for third party failover software when
upstream path failover is implemented, and it requires dual HBA's in each host
and dual switches.
Host/Server (Node A)
FC HBA 1
Switch
H1
Right Host I/O Card
Failover
Circuit
Port 0 (P0)
Active
Controller 0 (C0)
Duplex Mode Logical View - Multi-Port Mirrored SAN Attach Dual Switch Connection
In this topology the Host I/O card switch 1, 2, and 6 are set to the "Up" position.
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.
FC HBA 2
H0
Port 1 (P1)
Active
Multi-Port Mirrored SAN Attach Dual Switch Connection
Chapter 2 - Topologies and Operating Modes
Host/Server (Node B)
FC HBA 1 FC HBA 2
Switch
H1 H0
Left Host I/O Card
Failover
Circuit
Port 0 (P0) Port 1 (P1)
Active Active
Controller 1 (C1)
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