What is the difference between a volume and a qtree?

• A. A volume is a top-level data container; a qtree is a subdirectory used for quotas and access controls (primarily in older systems).
• B. A volume is a backup file; a qtree is a data snapshot.
• C. A qtree is the top-level container; a volume is a subdirectory used for quotas.
• D. A volume stores metadata only; a qtree stores actual data.

Answer: (A)

A volume is the top‑level data container that ONTAP exports to clients, serving as the main unit of storage you allocate and manage. A qtree is a subdirectory inside that volume that can have its own quotas and access controls, allowing per‑tenant or per‑application isolation within a single volume. This setup is why the statement about a volume being the container and a qtree being a subdirectory used for quotas and ACLs (primarily in older systems) is correct. The other choices mix up the roles—volumes aren’t backup files or metadata-only containers, and a qtree isn’t the top‑level container or a data snapshot.