Compaq Parallel Database Cluster Model PDC/O1000 for Oracle8i and Windows 2000 Administrator Guide

Architecture 2-15
Compaq Confidential – Need to Know Required
Writer: John Blackburn Project: Compaq Parallel Database Cluster Model PDC/O1000 for Oracle8i and Windows 2000 Administrator Guide
Comments:
Part Number: 225083-002 File Name: c-ch2 Cluster Architecture.doc Last Saved On: 6/11/01 11:20 AM
Fibre Channel SAN Switch-to-Array Controller
Paths
Figure 2-6 highlights the I/O data path that runs between the Fibre Channel
SAN Switch and the RA4000 Array Controller in each RA4000/RA4100
Array of a Fibre Channel Fabric. There is one path for each array controller.
Client LAN
Fibre
Host Adapters
Fibre
Host Adapters
RA4000/4100 Array
Fibre Channel
SAN Switch
Switch
(Cluster Interconnect)
ProLiant
Servers
ProLiant
Servers
Figure 2-6. Fibre Channel SAN Switch-to-array controller I/O data path
If this connection experiences a fault, the affected RA4000/RA4100 Array
cannot be accessed from any of the cluster nodes. Because the nodes do not
have access to the affected RA4000/RA4100 Array, users cannot reach the
data contained on that array. The data, however, is unharmed and remains
safely stored on the physical disks inside the RA4000/RA4100 Array.
As with the Fibre Host Adapter-to-Fibre Channel SAN Switch data path,
Compaq Insight Manager detects this fault, changes the affected
RA4000/RA4100 Array’s status to “Failed,” and changes its condition to red.