Fujitsu IRF-1D series, User Manual

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Chapter 2 - Topologies and Operating Modes
Multi-Port Mirrored Dual Host System-Single Connection
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Multi-Port Mirrored Dual Host System-Single Connection
This topology provides one of the more robust active-active RAID storage
solution for dual host systems with single Fibre ports. It has the following
advantages: high availability and high-performance where each host requires
access to all LUNs, redundant active-active RAID controllers, transparent failover
and failback, and shared storage between two host systems.
Its disadvantage is the single fibre loop which becomes a single point of failure.
Duplex Mode Logical View - Multi-Port Mirrored Dual Host System-Single 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 1
Host/Server (Node A) Host/Server (Node B)
FC HBA 1
H0
H1
Right Host I/O Card
Left Host I/O Card
H0 H1
Controller 0 (C0) Controller 1 (C1)
Port 0 (P0)
Active
Port 1 (P1)
Active
Port 0 (P0)
Active
Port 1 (P1)
Active
Failover
Circuit
Failover
Circuit
imageRAID.book Page 30 Tuesday, September 23, 2003 4:08 PM