HP XP Array Manager Software - Manual (Page 449)

Example configuration in which data is remotely copied between multiple sites (for open
systems)
When multiple Replication Manager servers manage the same
information source
In configurations where multiple Replication Manager servers manage the same information source
(DevMgr / BCM), the servers cannot simultaneously monitor and manage pairs. If different servers
issue simultaneous processing requests to an DevMgr Agent or BCM Agent associated with an
information source, there is a possibility for errors during DevMgr Agent or BCM Agent processing.
In such configurations where Replication Manager is to be set up on both the local (operating) site
and remote (standby) site in order to prepare for disaster recovery, HP recommends that the status of
Replication Manager server on the standby site be set to maintenance mode. If the status is not set to
maintenance mode, an error might occur on either the operating site or the standby site, when
Replication Manager instances on the both of these sites attempt to perform operations simultaneously
on the information source.
User Guide 449