Administrator Guide

Table Of Contents
Replication 1: Storage Center A Storage Center B
Replication 2: Storage Center A Storage Center C
Cascade mode: A source volume is replicated in series to multiple Storage Centers.
Example: Two replications are created in series:
Replication 1: Storage Center A Storage Center B
Replication 2: Storage Center B Storage Center C
Topology Limitations for Volumes Associated with Multiple Replications
The following limitations apply to volumes that are associated with multiple replications.
Only one synchronous replication can be configured per source volume. Subsequent replications must be asynchronous.
For cascade mode (replications configured in series), only the first replication can be a synchronous replication. Subsequent
replications in the series must be asynchronous.
Disaster Recovery Limitations for Volumes Associated with Multiple
Replications
The following disaster recovery limitations apply to volumes that are associated with multiple replications.
Activating disaster recovery for a volume removes other cascade mode replications associated with the volume.
Restoring a replication removes all other associated mixed mode replications.
Replications that are removed by disaster recovery must be manually recreated. To use the original destination volumes for the
secondary replications, remove the remote Storage Center mappings, then select the Use an Existing Volume check box when
recreating the replications.
Replication on SCv2000 Series Storage Systems
SCv2000 series storage systems have limited replication functionality. The following replication limitations apply to SCv2000
series storage systems:
Live Volume is not supported
High Availability is not supported
High Consistency is not supported
NOTE:
All replications require a Data Collector. When directly connected to a Storage Center, replication options are not
available.
Replication Icons
The icons displayed for replications on the Storage tab of the Storage view indicate whether the volume is the source or
destination of the replication.
Icon
Description
The volume is the source for a replication to a remote Storage Center or the source volume in a copy, mirror,
or migrate relationship.
The volume is the destination for a replication from a remote Storage Center.
Simulating Replications
Simulated replications allow you to estimate requirements for replication and determine an optimal balance between volumes,
snapshot schedules, bandwidth schedules, and your recovery plan.
About this task
NOTE: For user interface reference information, click Help.
Storage Center Replications and Live Volumes 503