NS0-157 · Question #173
What kind of structure can be deduplicated?
The correct answer is C. A FlexVol. In NetApp ONTAP, deduplication is a feature that operates at the FlexVol volume level, not on disks, aggregates, or qtrees.
Question
What kind of structure can be deduplicated?
Options
- AA disk
- BAn aggregate
- CA FlexVol
- Da qtree
How the community answered
(20 responses)- A5% (1)
- B5% (1)
- C90% (18)
Why each option
In NetApp ONTAP, deduplication is a feature that operates at the FlexVol volume level, not on disks, aggregates, or qtrees.
A disk is a physical hardware component and does not expose a filesystem layer where ONTAP deduplication can operate.
An aggregate is a collection of disks forming a storage pool and is not a target for deduplication; deduplication works above the aggregate level on volumes.
FlexVol volumes are the unit of storage on which ONTAP deduplication (ASIS - A-SIS) operates. Deduplication scans blocks within a FlexVol and removes duplicate data blocks, storing only a single copy and using pointers for subsequent references. Neither aggregates nor disks expose the block-level metadata structures needed for deduplication tracking.
A qtree is a logical subdirectory within a FlexVol, not an independent storage structure, so deduplication cannot be applied directly to a qtree.
Concept tested: NetApp ONTAP FlexVol deduplication (ASIS)
Source: https://docs.netapp.com/us-en/ontap/volumes/deduplication-concept.html
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