Compaq ProLiant Clusters HA/F100 Administrator's Manual page 61

Designing the Compaq ProLiant Clusters HA/F100 and HA/F200 2-27
The active data paths run from the active host bus adapters in the servers to the
active storage hub. If this path fails, the applications can seamlessly fail over
to the standby host bus adapter-to-storage hub data paths (Figure 2-15).
A
S
Server
storage hub
or switch
Active
Figure 2-15. Active hub-to-storage data path
The second active data path runs from the active hub or switch to the
RA4000/4100. If this path fails, the applications can seamlessly fail over to the
standby hub-to-RA4000/4100 data path.
The dual redundant loop feature of the Compaq ProLiant Cluster HA/F200
increases the level of availability over clusters that have only one path to the
shared storage. In addition, the second path in the HA/F200 provides for
improved performance through static load balancing. Static load balancing
considerations are discussed in the "Static Load Balancing" section of this
chapter.
A
S
Server
storage hub
or switch
Standby
RA4000/4100