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

    (Alpha only) CRDENABLE enables or disables detection and logging
    of memory-corrected read data (ECC) errors. This parameter should
    normally be set to (1).

    Beginning with OpenVMS Version 7.2, CRD_CONTROL can expand the
    function of CRDENABLE. (Refer to CRD_CONTROL.)