Update_Files
    Noupdate_Files

    The Update_Files qualifier specifies that the root will be
    restored, and RMU Restore Only_Root will attempt to link that
    restored root to the area files. In addition, the snapshot (.snp)
    file will be updated or created. This is the default.

    The Noupdate_Files qualifier specifies that the restore operation
    will restore the root, but it will not link that restored root
    to any of the area files, nor will it create or update the .snp
    files.

    When you use the Noupdate_Files qualifier in conjunction with
    the Noset_Tsn qualifier, you can use a backup strategy that uses
    recent by-area full backup files in place of a recent full and
    complete backup file of the entire database. See Example 6 in the
    Examples help entry under this command