VMS Help BACKUP Command, Qualifiers, /IGNORE  *Conan The Librarian (sorry for the slow response - running on an old VAX)

       /IGNORE=option

    Command Qualifier

    Specifies that a BACKUP save or copy operation will override
    restrictions placed on files or will not perform tape label
    processing checks.

    The /IGNORE=option qualifier has the following options:

    ACCESSIBILITY    Processes files on a tape that is protected by
                     a volume accessibility character, or on a tape
                     created by HSC Backup. The option applies only
                     to tapes. It affects the first tape mounted and
                     all subsequent tapes in the save set.
    INTERLOCK        Processes files that otherwise could not be
                     processed due to file access conflicts. Use
                     this option to save or copy files currently open
                     for writing. You must have the user privilege
                     SYSPRV, a system UIC, or ownership of the volume
                     to use this option.
    LABEL_           Saves or copies the contents of files to the
    PROCESSING       specified magnetic tape volume regardless of
                     the information contained in the volume header
                     record. BACKUP does not verify the volume label
                     or expiration date before writing information to
                     the tape volume. Note that you cannot use this
                     option with the /EXACT_ORDER qualifier.
    NOBACKUP         Saves or copies both the file header record and
                     the contents of files marked with the NOBACKUP
                     flag by the /NOBACKUP qualifier of the DCL
                     command SET FILE. If you do not specify this
                     option, BACKUP saves only the file header record
                     of files marked with the NOBACKUP flag.