Multi-Port Mirrored Dual Host System-Quad Connection - NexStor 4900F Series User Manual

Multi-Port Mirrored Dual Host System-Quad Connection

This topology provides one of the more robust active-active RAID storage
solution for dual host systems with dual fibre ports. It has the following
advantages: high availability and high-performance where each host requires
access to all logical drives (LUNs), redundant active-active RAID Controllers,
transparent failover and failback, and shared storage between two host systems.
Its disadvantages are the requirement for dual ported HBA's and multiple cables.
Host/Server (Node A)
FC HBA 1
H1
Right Host I/O Card
Failover
Circuit
Port 0 (P0)
Active
Controller 0 (C0)
Duplex Mode Logical View - Multi-Port Mirrored Dual Host System-Quad 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 RAID Controller.
Switch 6 enables automatic internal hub failover during a controller failure.
FC HBA 2
H0
Port 1 (P1)
Active
Multi-Port Mirrored Dual Host System-Quad Connection
Chapter 2 - Topologies and Operating Modes
Host/Server (Node B)
FC HBA 1 FC HBA 2
H1 H0
Left Host I/O Card
Failover
Circuit
Port 0 (P0) Port 1 (P1)
Active Active
Controller 1 (C1)
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