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

    Includes in the dump all blocks allocated to the file. (By
    default, the dump does not include blocks following the end-
    of-file [EOF].)

    You can specify the /ALLOCATED qualifier if the input is a disk
    that is mounted without the /FOREIGN qualifier. The /ALLOCATED
    and /RECORDS qualifiers are mutually exclusive.