Administrator Guide

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 congured per source volume. Subsequent replications must be asynchronous.
• For cascade mode (replications congured in series), only the rst 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 Controllers
SCv2000 series controllers have limited replication functionality. The following replication limitations apply to SCv2000 series
controllers:
• Live Volume is not supported
• SCv2000 series controllers can replicate to SCv2000 series controllers only
• High Availability is not supported
• High Consistency is not supported
• Portable Volume replication 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.
NOTE: For user interface reference information, click Help.
Simulate a Replication
Run a synchronous replication simulation to verify bandwidth requirements and optimal data movement.
1. Click the Storage view.
2. In the Storage pane, select the Storage Center that hosts the volume for which you want to simulate replication.
3. In the Summary tab, click Actions, then select Replication→ Simulate Replicate Volumes.
• If one or more QoS denitions exist, the Create Simulation Replication wizard appears.
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Storage Center Replications and Live Volumes