/sys$common/syshlp/helplib.hlb MOUNT, Qualifiers, /UNDEFINED_FAT  *Conan The Librarian (sorry for the slow response - running on an old VAX)

       /UNDEFINED_FAT=record-format:[record-attributes:][record-size]

    Establishes default file attributes to be used for records on ISO
    9660 media for which no record format has been specified.

    The following table describes the parameters:

    Parameter     Description

    record-       Specifies the format for all records in a file:
    format        FIXED, VARIABLE, STREAM, STREAM_LF, STREAM_CR,
                  LSB_VARIABLE, or MSB_VARIABLE. For a description
                  of these record formats, refer to the discussion
                  of the RMS field FAB$B_RFM in the OpenVMS Record
                  Management Services Reference Manual.

    record-       Specifies the attributes for all records in a
    attributes    file: NONE, CR, FTN, PRN, NOBKS. Applies only to
                  non-STREAM record formats. For a description of
                  these record attributes, refer to the discussion
                  of the RMS field FAB$B_RAT in the OpenVMS Record
                  Management Services Reference Manual.

    record-size   Specifies the maximum record size for all records
                  in a file: 0 to 32767. Applies only to FIXED
                  or STREAM record formats. For a description of
                  possible RMS record sizes, refer to the discussion
                  of the RMS field FAB$W_MRS in the OpenVMS Record
                  Management Services Reference Manual.

    ISO 9660 media can be mastered from platforms that do not support
    semantics of files containing predefined record formats. The
    /UNDEFINED_FAT qualifier establishes default file attributes to
    be used for records on ISO 9660 media for which no record format
    has been specified.

    The /UNDEFINED_FAT qualifier is valid only in conjunction with
    the /MEDIA_FORMAT=CDROM qualifier.

    This qualifier temporarily overrides all undefined file types,
    replacing them with selectable record formats having selectable
    record attributes and selectable record sizes as shown in the
    following illustration:

                   { FIXED:record-attributes[, . . . ]:record-size}
                   { VARIABLE:record-attributes[, . . . ]         }
                   { STREAM:record-size                           }
    record formats {                                              }
                   { STREAM_LF:record-size                        }
                   { STREAM_CR:record-size                        }
                   { LSB_VARIABLE:record-attributes[, . . . ]     }
                   {                                              }
                      { NONE - None           }
                      { CR - Carriage_return  }
    record_attributes { FTN - Fortran         }
                      { PRN - Print           }
                      {                       }
                      { NOBKS - No-Block-Span }

    record_size { 1 to 32767 }

    Example

    In the following example, the volume labeled OFFENS is mounted on
    DKA1 and all files on the volume are defined to be fixed length,
    carriage return, and 80 bytes in length. MOUNT also assigns the
    logical name STRAT.

    $ MOUNT/MEDIA_FORMAT=CDROM/UNDEFINED_FAT=(FIXED:CR:80) DKA1: OFFENS STRAT