# Offline Replication of Snapshots for the Dell PowerStore Storage Array

The offline replication of snapshots for the Dell PowerStore array, also called the Dell PowerStore snapshot replication feature, creates a replica copy of the primary snapshot of the local array on a remote array.

When you perform a snapshot backup operation, the software creates a snapshot on the local array. To replicate the snapshot to the remote array, perform an auxiliary copy operation.

## Key features

- Primary copy and replica copy can have separate retention policies.

- You can use the snapshots of the replica copy for the backup copy operation and for the restore operation.

## Limitations

- The revert operation on the replica copy is not supported.

- If the snapshot backup operation fails or gets killed after the creation of the snapshot, this might result in orphan snapshots on the remote array that you need to manually delete.

- Multiple remote arrays are not supported from the same subclient.

- Volume Group replication is not supported.

## Terminology

The terms remote array and replication partner mean the same.

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