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

2-22 Compaq Parallel Database Cluster Model PDC/O1000 for Oracle8i and Windows 2000 Administrator Guide
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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
Storage Hub/FC-AL Switch-to-Array Controller
Paths
Figure 2-11 highlights the I/O data path that runs between the Storage Hub or
FC-AL Switch and the RA4000 Array Controller in each RA4000/RA4100
Array of the FC-AL. There is one path for each array controller.
Client LAN
Fibre
Host Adapters
Fibre
Host Adapters
RA4000/4100 Array
Storage Hub/FC-AL Switch
Switch
(Cluster Interconnect)
ProLiant
Servers
ProLiant
Servers
Figure 2-11. Storage Hub/FC-AL 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-Storage Hub/FC-AL 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.