Creating SPARSE Diskgroup - Exadata Snapshot Clones

create diskgroup DG_SPARSE
  normal redundancy 
  disk 'o/*/SPARSE_*'
  attribute 
    'compatible.asm'          = '12.1.0.2',
    'compatible.rdbms'        = '12.1.0.2',
    'cell.smart_scan_capable' = 'true',
    'cell.sparse_dg'          = 'allsparse',
    'au_size'                 = '4M';