Compaq Parallel Database Cluster Model PDC/O2000 for Oracle8i and Windows 2000 Administrator Guide

Cluster Architecture 2-41
Figure 2-15 shows a two-node PDC/O2000 with a redundant FC-AL that
contains two loops, one for each Fibre Host Adapter per node. The
components and cable paths for the first loop are shaded to distinguish them
from the components for the other loop.
Fibre Host
Adapters (2)
RA4000/4100 Array #1
RA4000/4100 Array #2
FC-AL Switch/Storage
Hub #1
FC-AL Switch/Storage
Hub #2
Node 1 Node 2
Fibre Host
Adapters (2)
Figure 2-15. Two-node PDC/O2000 with a two-loop redundant Fibre
Channel Arbitrated Loop
Used in conjunction with the I/O path failover capabilities of Secure Path
software, this redundant FC-AL configuration gives cluster resources
increased availability and fault tolerance.