/LABEL=(item[=keyword])

    Specifies a volume label string to be synthesized, or a volume
    label string to be obtained from an external source.

    HOST_      DENSE     Use the current OpenVMS host version string,
    VERSION              less any punctuation characters or spaces,
                         as the volume label, or as the suffix
                         portion of the volume label string. A
                         maximum of up to the first six characters of
                         the version string is used. Can be combined
                         with PREFIX_STRING, though the aggregate
                         label name string length limit remains 11
                         characters.
    HOST_      UNDERSCORESUse the current OpenVMS host version
    VERSION              string, replacing all punctuation with
                         underscores, as the volume label, or as
                         the suffix portion of the volume label
                         string. A maximum of up to the first eight
                         characters of the version string is used.
                         Can be combined with PREFIX_STRING, though
                         the aggregate label name string length limit
                         remains 11 characters.
    LOGICAL_   LNM       Translates the specified logial name or,
    NAME                 if no string is specified, translate the
                         logical name EFI$INIT_VOLUME_LABEL. Cannot
                         be combined with other items.
    PREFIX_    PFX       Use the specified string as the prefix for
    STRING               the volume label. A total of 11 characters
                         can be specified. Can be combined with HOST_
                         VERSION, though the aggregate label name
                         string length limit remains 11 characters.