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Cluster : Storage > Aggregates : Understanding aggregates : Understanding 64-bit and 32-bit aggregates
Understanding 64-bit and 32-bit aggregates
Aggregates are either 64-bit or 32-bit format. 64-bit aggregates have much larger size limits than 32-bit aggregates. 64-bit and 32-bit aggregates can coexist on the same storage system or cluster.
32-bit aggregates have a maximum size of 16 TB; 64-bit aggregates have a maximum size of up to 100 TB, depending on the storage system model. For the maximum 64-bit aggregate size of your storage system model, see the Hardware Universe (formerly the System Configuration Guide) at support.netapp.com/knowledge/docs/hardware/NetApp/syscfg/index.shtml.
You decide the format of an aggregate when you create it. By default, newly created aggregates are 64-bit.
You can expand 32-bit aggregates to 64-bit aggregates by increasing their size beyond 16 TB. 64-bit aggregates, including aggregates that were previously expanded, cannot be converted to 32-bit aggregates.

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