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

2-14 Compaq Parallel Database Cluster Model PDC/O2000 for Oracle8i and Windows 2000 Administrator Guide
Compaq Confidential – Need to Know Required
Writer: John Blackburn Project: Compaq Parallel Database Cluster Model PDC/O2000 for Oracle8i and Windows 2000 Administrator Guide Comments:
Part Number: 225082-002 File Name: c-ch2 Cluster Architecture.doc Last Saved On: 6/13/01 10:21 AM
I/O Data Paths in a Redundant Fibre Channel Fabric
A distinct I/O path connection exists between each Fibre Host Adapter in a
redundant Fibre Channel Fabric and every array controller port in each
RA4000/RA4100 Array in that redundant Fibre Channel Fabric.
Fibre Host Adapter-to-Fibre Channel SAN
Switch Paths
Figure 2-4 highlights the I/O data paths that run between the Fibre Host
Adapters and the Fibre Channel SAN Switches in a redundant Fibre Channel
Fabric.
Fibre Host
Adapters (2)
RA4000/4100
Array #1
RA4000/4100
Array #2
Fibre Channel
SAN Switch #1
Node 1 Node 2
Fibre Channel
SAN Switch #2
Fibre Host
Adapters (2)
Figure 2-4. Fibre Host Adapter-to-Fibre Channel SAN Switch data paths
Secure Path monitors the status of the components along each active path. If
Secure Path detects the failure of a Fibre Host Adapter, Fibre Channel cable,
or Fibre Channel SAN Switch along an active path, it automatically transfers
all I/O activity on that path to the components on the defined backup path.