nStor NexStor 4200F Series, User Manual

Page: 43 / 174

Chapter 2 - Topologies and Operating Modes
Multi-Port Dual Host System-Quad Connection
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Multi-Port Dual Host System-Quad Connection
Duplex Mode Logical View - Multi-TID Dual Host System-Quad Connection
This Multi-TID topology provides one of the more high-performance active-active
RAID storage solution for dual host systems with dual Fibre ports.
It offers advantages of the highest bandwidth performance and all ports are on
separate Fibre loops.
It’s two disadvantages are no redundant RAID controllers, no transparent failover
and failback and no upstream failover.
In this configuration the Host I/O card switches 4 and 5 are set to the “off”
position. This will isolates each Host I/O port and host controller port.
FC HBA 1
Host/Server (Node A) Host/Server (Node B)
FC HBA 2 FC HBA 1 FC HBA 2
H0
H1
Right Host I/O Card
Left Host I/O Card
SW 4
H0 H1
SW 4
SW 5 SW 5
Controller 0 Controller 1
FC Host
C1P0
Active
FC Host
C1P1
Active
FC Host
C0P0
Active
FC Host
C0P1
Active
4200F.book Page 31 Thursday, January 23, 2003 2:47 PM