NS0-157 · Question #260
Which statement is true about a Flash Pool?
The correct answer is C. A 64-bit aggregate containing SSDs and HDDs. A Flash Pool is a 64-bit aggregate that combines both SSDs and HDDs, using the SSDs as a high-performance cache tier for the spinning disk storage.
Question
Which statement is true about a Flash Pool?
Options
- AA 32-bit or 64-bit aggregate containing SSDs and HDDs
- BA 32-bit aggregate containing SSDs and HDDs
- CA 64-bit aggregate containing SSDs and HDDs
- DA 64-bit aggregate containing only SSDs
How the community answered
(35 responses)- B3% (1)
- C94% (33)
- D3% (1)
Why each option
A Flash Pool is a 64-bit aggregate that combines both SSDs and HDDs, using the SSDs as a high-performance cache tier for the spinning disk storage.
A Flash Pool cannot be a 32-bit aggregate - ONTAP requires the 64-bit aggregate format for Flash Pool configurations to support its advanced caching features.
A 32-bit aggregate with SSDs and HDDs does not qualify as a Flash Pool - only 64-bit aggregates support Flash Pool configurations.
A Flash Pool is specifically a 64-bit aggregate architecture that mixes SSD cache with HDD storage. The 64-bit aggregate format is required because it supports the larger capacity and advanced features needed for tiered caching. The SSDs serve as a read and write cache layer, accelerating access to the HDD-based data while keeping costs lower than all-flash storage.
An aggregate containing only SSDs describes an All Flash FAS aggregate or SSD-only aggregate, not a Flash Pool, which by definition requires both SSDs and HDDs.
Concept tested: NetApp Flash Pool aggregate type and disk composition
Source: https://docs.netapp.com/us-en/ontap/disks-aggregates/flash-pool-aggregate-caching-policies-concept.html
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