To support the differing security, backup, performance, and data sharing needs of your users, you group the physical data storage resources on your storage system into one or more aggregates. These aggregates provide storage to the volume or volumes that they contain.
Each aggregate has its own RAID configuration, plex structure, and set of assigned disks or array LUNs.
For information about best practices for working with aggregates, see Technical Report 3437: Storage Best Practices and Resiliency Guide.