Rackable Systems OmniStor 4900F 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 logical drives (LUNs),
redundant active-active Wahoo2 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 Wahoo2 RAID Controller.
Switch 6 enables automatic internal hub failover during a controller failure.