32 to 64 bit aggregates

64 bit aggregate is a feature which is available only from Ontap 8.1
Please find below few FAQ of the same:

WILL AN UPDATE TO DATA ONTAP 8.1 TRIGGER THE EXPANSION PROCESS?

No. The expansion process can only be triggered with the addition of disks if the size of the aggregate
exceeds 16TB.

CAN I SHRINK AN AGGREGATE?

No. The size of an aggregate cannot be decreased.

CAN I EXPAND MY 32-BIT ROOT AGGREGATE TO 64-BIT?

If there is a strong requirement to expand your root aggregate beyond 16TB, you can add disks and
trigger the 64-bit expansion on the root aggregate.

CAN I CONVERT MY 64-BIT AGGREGATE TO 32-BIT?

No. This is not supported irrespective of the size of the aggregate.

CAN I EXPAND MY 32-BIT AGGREGATE TO 64-BIT WITHOUT THE ADDITION OF DISKS?

No. The administrator will have to add disks to trigger the 64-bit expansion.

ARE BLOCKS IN SNAPSHOT COPIES ALSO CONVERTED TO THE 64-BIT FORMAT?

No. Snapshot copies are read-only and are not updated by the expansion process. The expansion
process updates indirect blocks in the active file system.

DOES THE EXPANSION PROCESS RESTART FROM THE BEGINNING IF INTERRUPTED?

No. The expansion process maintains checkpoints. If the process is interrupted, it resumes from the latest
checkpoint.