You want to make efficient use of your disk storage and save money by tiering your infrequently accessed data to a less expensive object store. Which…

NetApp FabricPool is the technology designed specifically for automated data tiering. It identifies and moves infrequently accessed ("cold") data blocks from a high-performance All-Flash (SSD) aggregate, known as the performance tier, to a low-cost object store, the cloud tier. This process is transparent to users and applications, freeing up valuable space on the expensive performance tier and reducing overall storage costs, which directly satisfies the requirements stated in the question.

B. SnapVault: This is a disk-to-disk backup technology for long-term data retention and archival, not an automated tiering solution for active data.

C. SnapMirror: This is a data replication technology used for disaster recovery (DR) and business continuity. It replicates entire volumes, not just cold data blocks.

D. FlexCache: This technology caches frequently accessed (hot) data at remote locations to accelerate read performance, which is the opposite of tiering cold data away.

1. NetApp Technical Report 4598, FabricPool Best Practices, Page 5, Section 1.1: "NetApp FabricPool technology is a hybrid storage solution that uses an all-flash (all-SSD) aggregate as a performance tier and an object store as a cloud tier. FabricPool automatically and transparently tiers cold data from the performance tier to the cloud tier..."

2. NetApp ONTAP Documentation, ONTAP concepts, "Storage tiering with FabricPool": "FabricPool provides a storage tiering solution that lets you automatically tier data between a high-performance tier (an all-flash aggregate) and a capacity tier (an object store in a public or private cloud). Tiering inactive data in this way enables you to reduce storage cost without compromising performance, efficiency, or protection."

3. NetApp ONTAP Documentation, Data protection and disaster recovery, "SnapMirror disaster recovery": "SnapMirror is disaster recovery technology, designed for failover from a primary storage system to a secondary storage system."

4. NetApp ONTAP Documentation, Data protection and disaster recovery, "SnapVault backup and recovery": "SnapVault is a disk-to-disk (D2D) backup solution that creates point-in-time copies of data from a primary system to a secondary system."

5. NetApp ONTAP Documentation, Caching and performance, "FlexCache volume overview": "FlexCache technology enables you to cache volumes from a cluster anywhere in the world, providing faster data access to your users."