An aggregate in ONTAP storage is defined as

• A. A logical volume that stores user data.
• B. A disk collection that provides the physical space for FlexVols to reside.
• C. A caching layer for hot data.
• D. A backup repository.

Answer: (B)

An ONTAP aggregate is the physical storage pool created from one or more disks, configured with RAID protection, that provides the space for FlexVols to reside. In other words, the aggregate is the disk collection that backs the actual storage where volumes live. FlexVols are the logical volumes that hold user data, but they sit inside an aggregate rather than being the aggregate itself. The other ideas describe a caching layer or a backup repository, which are not what defines an aggregate.