A storage administrator wants to enable the Advanced Data Deduplication on a LUN, but the feature is not available. What is the cause of this issue?

Question

Options

• AA Data reduction is not enabled.
• BAdvanced data reduction is not licensed.
• CThe LUN is in a consistency group.
• DIt can only be enabled on an All-flash pool.

• A
  4% (1)
• B
  13% (3)
• C
  4% (1)
• D
  79% (19)

Explanation

Advanced Data Deduplication is only supported on All-Flash pools because the feature relies on the high IOPS and low latency of flash storage to perform inline deduplication without impacting performance - hybrid pools with spinning disk cannot meet these requirements, so the option simply won't appear. Option A is wrong because Data Reduction is a broader umbrella setting; disabling it would prevent deduplication from running, not make the feature unavailable in the UI. Option B is wrong because licensing restrictions typically present as a licensed-but-blocked state, and Advanced Deduplication in most enterprise arrays (e.g., Dell EMC Unity) is included with the platform rather than a separate SKU that would cause this symptom. Option C is wrong because consistency group membership restricts replication and snapshot behaviors, not storage efficiency feature availability.

Memory tip: Think "All-Flash = All-Features" - the advanced efficiency features (inline dedup, compression) are only unlocked when the underlying pool is entirely flash-based, because the speed of SSDs is what makes those real-time operations feasible.

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