backing up after-image journal sequence number <num>

  Explanation:  The created after-image backup file will be
  internally identified with the indicated sequence number.  When
  AIJ files are rolled forward, the roll-forward utility will
  prompt for specific AIJ sequence numbers.  The AIJ file sequence
  number should be included as a component of any external file
  identification information, such as magtape labels.

  User Action:  No user action is required.  This message is
  informational only.