On an AFF system, which three storage efficiencies are enabled by default?

On AFF systems, compaction, deduplication, and compression are enabled by default as core storage efficiency features. AFF platforms are designed around flash media and ONTAP inline efficiencies, so ONTAP applies these efficiencies automatically to reduce physical space consumption while preserving performance. Reallocation is not a default data-reduction technology in this context; it is associated with layout optimization and is not part of the standard AFF default efficiency set. Encryption may be enabled in some environments depending on configuration, NVE, NAE, or self-encrypting drives, but it is a security feature rather than a default space efficiency feature. The correct choices are the technologies that reduce physical storage footprint inside ONTAP volumes and aggregates on AFF. A support engineer should distinguish default AFF efficiency behavior from optional security and layout functions. References/topics: AFF storage efficiency defaults, inline deduplication, inline compression, data compaction, and ONTAP capacity efficiency.