# Considerations for Immutable Snapshots on NetApp Primary Snapshot copy

Review the following Considerations and recommendations before enabling immutable snapshot on NetApp primary snapshot copy with tamperproof support.

- The clients, Remote MediaAgents, and Access nodes must be on Innovation Release (11.38.20) or later.

- You can only set days-based retention on the snapshot copies. Extended retention is not supported. Spool copy is also not supported.

- You must enable REST API on the array.

- Set snapshot-locking-enabled field to true on all the primary volumes. You can use the following command:

       volume modify -vserver $[SVM Name] -volume $[volume name] -snapshot-locking-enabled $[true]

  For vault/replica copies, see Creating Relationships for the NetApp Open Replication with SnapLock Enterprise and Tamperproof Support.

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