CREATE DISKGROUP diskgroup_name
  [ { HIGH | NORMAL | FLEX | EXTERNAL } REDUNDANCY ]
  { [ QUORUM | REGULAR ] [ FAILGROUP failgroup_name ]
    DISK qualified_disk_clause [, qualified_disk_clause]...
  }...
  [ ATTRIBUTE { 'attribute_name' = 'attribute_value' }
              [, 'attribute_name' = 'attribute_value' ]... ]
;