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

    Specifies whether all writes are to be checked by comparing the
    new disk records with the original records in memory.

    Format

      /WRITE_CHECK

      /NOWRITE_CHECK  (DEFAULT)

    If you use this switch, each new record on the disk is read and
    then compared with the original record in memory.