in CLI type the following: 
filer1*> aggr options
aggr options: No aggregate name supplied.
usage:
aggr options <aggr-name> <option-name> <option-val>
The following commands are available; for more information
type "aggr help options <command>"
free_space_realloc  lost_write_protect  raidsize            root                
fs_size_fixed       nosnap              raidtype            snapmirrored        
ha_policy           percent_snapshot_space resyncsnaptime      snapshot_autodelete 
hybrid_enabled      
filer1*> 
enjoy