Compaq StorageWorks Data Replication Manager HSG80 ACS Version 8.5P Operations Guide

Managing Site Failover and Failback Procedures 5–5
Figure 5–1. Data Replication Manager basic configuration
This chapter demonstrates example failover and failback procedures using a fictional
Building A as the initiator site and Building B as the target site. The examples described
will failover from Building A to Building B and then failback from Building B back to
Building A.
This document consistently refers to Building A as the initiator site and Building B as the target site.
This does not change even after failover has occurred to Building B (and before failback has
occurred to Building A). While in failover mode, the controllers in Building B are acting as the
initiator for remote copy sets and is referred to as the target in this document.
Once the failback procedure is completed, the controllers in Building A resume their role as the
initiator for remote copy sets.
Planning Considerations
Table 5–2 describes the constraints that need to be considered in the initial planning of
Data Replication manager (DRM) failover/failback procedures planning.
CXO7172A
BuildngBBuildngA
BuildngBBuildngA
Host A Host B