Administrator Guide

NOTE: Preserve Live Volume DR activation is available only if the primary Storage Center and secondary Storage Center are
both running version 6.5 or later.
• Recreate Live Volume: If Preserve Live Volume is not selected or not available, Storage Manager deletes the Live Volume, creates a
view volume, and maps it to a server. During the recovery process, the Live Volume is recreated. If a replication is managed by the Live
Volume, the managed replication is removed during the recovery process.
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.
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Storage Center DR Preparation and Activation