default list (segmented string) storage area can not be a  WRITE
  ONCE area

  Explanation:  An attempt was made to create a  database  with  a
  default  list  (segmented  string) storage area on a WORM (write
  one read many) device.  This is  not  supported  by  Oracle  Rdb
  because  the format of the lists written by the system relations
  is not compatible with the WORM drive characteristics.

  User Action:  Create the default list storage area on read/write
  media and create a storage map to assign the lists to particular
  storage areas.