/SAVE_RECOVERY_DATA (default)
       /NOSAVE_RECOVERY_DATA

    Enables or disables the retention of recovery data for the
    PRODUCT UNDO PATCH command to use.

    This qualifier applies only to patch and mandatory update kits.
    It is ignored when full, operating system, platform, partial, or
    transition kits are installed.

    The directories, files, and libraries that are modified or
    deleted in the process of installation are saved in a directory
    tree on the system disk unless you specify /NOSAVE_RECOVERY_DATA.
    These files, along with a copy of the product database, comprise
    the recovery data set. This recovery data set can be used later
    to uninstall patch and mandatory update kits.