Compaq ProLiant Clusters HA/F100 Administrator's Manual page 59

Designing the Compaq ProLiant Clusters HA/F100 and HA/F200 2-25
I
A storage hub, switch, or cable failure will be treated like a host bus
adapter failure and a failover to the second host bus adapter, which is
using a different storage hub and cables, will occur.
I
An array controller failure will cause the redundant array controller to
take over for the failed controller.
In all of the above examples, end users will experience minimal interruptions
while the failover occurs. In some cases, the interruptions may not even be
noticeable.
The following illustration depicts the HA/F200 configuration components.
RA4000/4100
storage hub storage hub
or switch or switch
storage hub storage hub
or switch or switch
LAN
Figure 2-13. HA/F200 configuration
HA/F200 Fibre Channel Data Paths
The Compaq StorageWorks RAID Array 4000/4100 storage system is the
mechanism with which the HA/F200 cluster implements shared storage. The
Compaq ProLiant Cluster HA/F200 minimum configuration consists of two
host bus adapters in each server, two Fibre Channel storage hubs or FC-AL
switches, two array controllers per RA4000/4100, and one or more
RA4000/4100s.
Node 1
Dedicated
Interconnect
Node 2