Hi,
FAS2020's maximum aggregate size is limited to (8TB). This limit is enforced by Data ONTAP 7.2.4L1, which restricts creation or expansion of an aggregate that is greater than (8TB) on FAS2020 systems.
Although the FAS2020 can effectively manage, address, and provide access to aggregates up to 16TB, the successful execution of WAFL recovery tools requires that FAS2020 aggregates be (8TB) or less.
For further more details refer KB article, https://kb.netapp.com/support/index?page=content&id=3012390&actp=search&viewlocale=en_US&searchid=1426744936085
Thanks
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