HP ProLiant Cluster HA/F500 for MA8000 Enhanced DT Supplement Guide

Introduction
Bidirectional DT Configuration
The bidirectional DT configuration adds two storage subsystems to the basic DT
configuration. The bidirectional DT configuration consists of the following:
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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 HBAs 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.
Figure 1-2: Bidirectional DT cluster configuration
1-8 HP ProLiant Cluster HA/F500 for MA8000 Enhanced DT Supplement Guide
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Writer: Bill Akers File Name: b-ch1 Introduction
Codename: Chargers II Part Number: 324547-001 Last Saved On: 4/7/03 10:30 AM