In a tiered storage system, NL-SAS disks belong to which tier?

• A. High-performance tier
• B. Capacity tier
• C. Low-performance tier
• D. Archival tier

Answer: (B)

Tiered storage groups media by performance and cost, moving data between levels based on how often it’s accessed and how fast it needs to be retrieved. Nearline SAS disks provide a good balance: they offer a large amount of storage at a lower cost than high-end performance disks, but they’re not as fast as SSDs or top-tier SAS drives. That makes them a natural fit for the capacity tier, the layer designed to hold large volumes of data that don’t require the fastest access. The archival tier is reserved for long-term, rarely accessed data (often tape or cold storage), while the high-performance tier uses the fastest media for active workloads. So NL-SAS disks belong in the capacity tier.