The  specified  multiple  tape  density   should   be   DEFAULT,
  COMPACTION or NOCOMPACTION

  Explanation:  A multiple tape density value has  been  specified
  for  this  SCSI  or  TA90,  TA90E  or  TA91  tape device that is
  invalid.  A value of COMPACTION, NOCOMPACTION or DEFAULT  should
  have   been  specified  with  the  DATA_FORMAT  qualifier.   The
  incorrect multiple tape density value  will  be  ignored  and  a
  correct value assumed.

  User Action:  Consider specifying  the  DEFAULT,  COMPACTION  or
  NOCOMPACTION   value  for  this  device  using  the  DATA_FORMAT
  qualifier.