nStor NexStor 4200F Series, Руководство пользователя

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Chapter 2 - Topologies and Operating Modes
Dual Port Multi-Host Connection
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Dual Port Multi-Host Connection
Simplex Operating Mode Logical View - Dual Port Multi-Host Connection
This topology provides a base RAID storage solution for up to four host systems.
It offers advantages of clustered storage between multiple host system, while not
requiring external hubs or switches. It has a few disadvantages which include the
controller as a single point of failure, the single Fibre loop, and it requires
third-party clustering software. It also has limited bandwidth performance due to
a singe Fibre loop (200 MB/sec).
In this configuration the Host I/O card switch 4 is set to the “Up” position.
Switch 4 ties the H0 and H1 ports to the same Fibre loop. This allows both host
port on each Host I/O card with an active connection to the specific controller
host port.
FC HBA 1
Host/Server (Node A) Host/Server (Node B)
FC HBA 2 FC HBA 1 FC HBA 2
H0
H1
C0P0
Active
C0P1
Active
Controller 0
Right Host I/O Card
Left Host I/O Card
SW 4
H0 H1
SW 4
SW 5 SW 5
4200F.book Page 25 Thursday, January 23, 2003 2:47 PM