Administrator Guide

Disaster Recovery Activation Limitations
Activating DR for a replication removes any replications that use the activated volume (original destination/secondary volume) as the
source volume.
Related link
Replicating a Single Volume to Multiple Destinations
Planned vs Unplanned Disaster Recovery Activation
During disaster recovery activation, you may choose whether you want to allow planned DR activation. The following table displays
some of the dierences between planned and unplanned DR activation.
Planned DR Activation Unplanned DR Activation
The servers on the production site are shut down. The servers on the production site are not shut down.
The Storage Centers on the production site do not have to be
shut down.
The Storage Centers on the production site are shut down.
The source volume is no longer mapped to the server. The source volume is still mapped to the production servers.
You can copy any remaining data prior to activation, eliminating
data loss.
Data may be lost, depending on the recovery point objective
(RPO).
The production site will not come back online while service has
switched to the DR site.
The production Storage Centers and the servers may come back
online, creating the danger of a split brain.
Disaster Recovery Activation Procedures
If an entire site becomes unavailable, DR can be activated for all aected volumes in a single operation. If a single volume becomes
unavailable, activate DR for the corresponding restore point.
Activate Disaster Recovery for Multiple Restore Points
If a pair of Storage Centers host multiple replications and/or Live Volumes, disaster recovery can be activated for all of the
corresponding restore points simultaneously.
Prerequisite
Save and validate restore points.
Steps
1. Click the Replications & Live Volumes view.
2. Click the Restore Points tab, then click Activate Disaster Recovery. The Activate Disaster Recovery wizard appears.
3. Select the source/destination Storage Center pair for which you want to activate DR, then click Next. The wizard advances to
the next page.
4. Choose whether you want to allow planned DR activation.
a. (Optional, replication only) To allow DR to be activated while the replication is functioning normally, select the Allow Planned
Activate Disaster Recoveries check box.
b. Click Next. The wizard advances to the next page.
5. In the Available Restore Points pane, select the restore points that you want to activate, then click Next. The wizard advances
to the next page.
6. Congure DR settings for each restore point.
a. Select the restore point that you want to modify, then click Edit Settings. The Activate Disaster Recovery dialog box
appears.
If the restore point corresponds to a synchronous replication, the dialog box displays additional information about the state
of the replication:
• The Sync Data Status eld displays the synchronization status for the replication at the time the restore point was
validated.
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Storage Center DR Preparation and Activation