Which statement about a disk shelf is NOT true?

• A. It stores data on SSDs for caching only.
• B. It holds disks and provides expansion capacity for aggregates and volumes.
• C. It connects to the storage controller to add disks.
• D. It enables more disks to be attached to aggregates.

Answer: (A)

A disk shelf is an expansion enclosure that adds more disks to the system, increasing capacity for existing aggregates and volumes. It connects to the storage controller so the controller can present those disks to the aggregates, allowing you to attach more disks to your pools and grow storage. Even if the shelf holds SSDs, its role isn’t to cache data exclusively; caching is handled by the controllers (and, in NetApp, can involve dedicated flash/cache features), while the shelf’s primary function is to provide additional disk capacity by housing drives and enabling their use by the controllers. That’s why saying the shelf stores data on SSDs for caching only isn’t accurate—the shelf’s purpose is expanding storage capacity, not a caching-only role.