Administrator Guide
Live Volume Types
Live Volumes can be created using asynchronous replication or synchronous replication.
The following table compares the Storage Center version requirements and features of each Live Volume type.
Live Volume Type Storage Center Snapshot Support Active Snapshot
Support
Deduplication Support
Asynchronous Version 5.5 and later Yes Yes Yes
Synchronous Version 6.5 or later Yes Yes Yes
Related link
Asynchronous Replication
Synchronous Replication
Live Volume Icon
The following icon is displayed for Live Volumes on the Storage tab of the Storage view to dierentiate it from regular volumes and
replicated volumes.
Icon Description
Primary/Secondary Live Volume
NOTE: To determine whether a Live Volume is primary or secondary from the Storage
tab, select the Live Volume, then see the Live Volume Attributes section under the
Summary subtab.
Live Volumes Roles
There are two roles for Live Volumes: primary and secondary. These roles determine the direction of the replication, and they can be
swapped automatically or manually. Write performance is reduced for the secondary volume because the primary volume must also
acknowledge these writes.
Storage Center
Role Description
Primary
• Hosts the primary volume, which is like the source volume for a conventional replication
• Replicates the primary volume to the secondary volume
• Processes all IO from both the primary and secondary site
Secondary
• Hosts the secondary volume
• Accepts IO for the Live Volume and routes it to the primary volume on the primary Storage
Center
Live Volume Roles Example
In the following examples, a server sends an IO request that modies the primary volume. The changes to the primary volume are
replicated to the secondary Storage Center over Fibre Channel or iSCSI. When a server connected to the secondary Storage Center
sends an IO request to the secondary volume, the secondary Storage Center forwards the IO request to the primary volume on the
primary Storage Center.
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Storage Center Replications and Live Volumes