Compaq ProLiant Cluster HA/F500 Enhanced DT Supplement

Introduction
1-8 ProLiant Cluster HA/F500 for MA8000 Enhanced DT Supplement Guide
COMPAQ CONFIDENTIAL
Writer: Woody Jernigan File Name: b-ch1 Introduction
Codename: Chargers Part Number: 165103-004 Last Saved On: 7/30/02 9:23 AM
Bidirectional DT Configuration
The bidirectional DT configuration adds two storage subsystems to the basic DT
configuration. The bidirectional DT configuration consists of the following:
• Two ProLiant servers as cluster nodes
• Four storage subsystems
• Four StorageWorks Fibre Channel SAN Switch 8/8-EL or SAN Switch 16/16-EL
switches
• Two host bus adapters in each server
• Two storage controllers in each storage subsystem
Figure 1-2 shows a bidirectional DT configuration consisting of two separated
nodes. As in the basic DT configuration, data at the first site is mirrored on a
second storage subsystem at the second site. The bidirectional DT solution adds an
initiator storage subsystem at the second site. This storage subsystem is mirrored at
the first site on a fourth storage subsystem (a target site). The first initiator-target pair
of storage subsystems mirrors data from the first site to the second site, while the
second initiator-target pair of storage subsystems mirrors data from the second site to
the first site.
Storage
Subsystem
Switch
Switch
Switch
Switch
Initiator Target TargetInitiator
ProLiant
Server
(Node 1)
SITE 1 SITE 2
ProLiant
Server
(Node 2)
Storage
Subsystem
FDDI/ATM Network
Figure 1-2: Bidirectional DT cluster configuration