Fujitsu IRF-1S series User Manual page 37

Dual Port Multi-Host Dual Connection
This topology provides a base shared RAID storage solution for up to four host
systems. It offers the following advantages: clustered storage between multiple
host system (no requirement for external hubs or switches). It has a few
disadvantages: the controller and the single fibre loop are single points of failure,
for clustering operations third-party clustering software is required and it also has
limited bandwidth performance due to a singe Fibre loop (200 MB/sec).
Host/Server (Node A)
FC HBA 1
H1
Right Host I/O Card
SW 4
Simplex Operating Mode Logical View - Dual Port Multi-Host Dual Connection
In this topology the Host I/O card switches 1, 2, and 4 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 4 provides the link between the Host I/O card "H0" and "H1" ports to
the same Fibre loop.
Chapter 2 - Topologies and Operating Modes
FC HBA 2
H0
Port 0 (P0) Port 1 (P1)
Active Active
Controller 0 (C0)
Host/Server (Node B)
FC HBA 1 FC HBA 2
H1 H0
Left Host I/O Card
SW 4
Dual Port Multi-Host Dual Connection
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