Fujitsu IRF-1D series, User Manual

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Chapter 2 - Topologies and Operating Modes
Multi-Port Mirrored SAN Attach Dual Switch Connection
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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.
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 1 FC HBA 2
Host/Server (Node A) Host/Server (Node B)
Switch
FC HBA 1 FC HBA 2
H0 H1
Right Host I/O Card
Left Host I/O Card
H0 H1
Controller 0 (C0) Controller 1 (C1)
Switch
Port 0 (P0)
Active
Port 1 (P1)
Active
Port 0 (P0)
Active
Port 1 (P1)
Active
Failover
Circuit
Failover
Circuit
imageRAID.book Page 33 Tuesday, September 23, 2003 4:08 PM