Galaxy A16F-R2431 Installation and Hardware Reference Manual
3-12
Sample Topologies
Configuration Rules:
1.
For details on the relationships among host links, host ID/LUNs, and
logical configurations, you may refer to
Chapter 12 Redundant
Controller
in your firmware operation manual.
2.
Shown above is a SAN application using independent host links to the
host ports on two RAID controllers.
3.
The configuration ensures that an application server can always access a
storage array in the event of cabling component failure.
4.
For the concerns with the N_port connections with FC switches, the
onboard hub function should be disabled.
5.
When onboard hub is disabled, the host ports on different RAID
controllers need to be separately connected to ports redundant FC
switches or ports in different zones in order to achieve fault tolerance.
6.
If Controller A fails, host LUNs previously associated with Controller
A will be managed by Controller B.
7.
Depending on I/O characteristics, each configured array should be
properly optimized either for Random or Sequential I/Os.
8.
You may also partition a logical capacity into two or more volumes and
let each server access separate volumes.
9.
With fault-tolerant cabling, host multipathing software is necessary.
10.
Data paths may also be strung across separate FC switches so that
access to array can continue if faults occur with a FC switch.
Figure 3-6: Shared Storage over Switched Fabric
