/RECOVERY_MODE (default)
       /NORECOVERY_MODE

    Enables or disables product reconfiguration in recovery mode. The
    directories, files, and libraries that are modified or deleted
    in the reconfiguration process are saved in a directory tree on
    the system disk unless you specify /NORECOVERY_MODE. These files,
    along with a copy of the product database, comprise the recovery
    data set.

    The recovery data set is handled somewhat differently when
    a reconfiguration ends successfully or if it terminates
    unsuccessfully.

    o  If a reconfiguration terminates in its execution phase, either
       voluntarily (by using Ctrl/Y or Ctrl/C) or involuntarily
       (because of a fatal error), the saved recovery data is used to
       roll back all the displaced objects in an attempt to reinstate
       the product environment prior to the interrupted operation.
       Then the recovery data set is deleted.

    o  At the end of a successful reconfiguration, the recovery data
       set is deleted.