You have a cluster with a node running root data partitioning and need to grow the
aggregate for additional data volumes.
What is NetApp’s best practice for increasing the aggregate size to optimize performance?

A.
Add 16 disks to the aggregate.

B.
Create a new aggregate and migrate all data with vol move.

C.
Add two disks to an existing RAID group.

D.
Add a complete RAID group at a time.

Explanation:
best practices when you add storage to an aggregate optimizes aggregate
performance:
Add a complete RAID group at a time.
https://library.netapp.com/ecmdocs/ECMP1368859/html/GUID-93C8D102-9666-
46AF-8350-03EFF8A6A68B.html