Library /sys$common/syshlp/sysmanhelp.hlb PARAMETERS, DISABLE, CHECKS, Description  *Conan The Librarian (sorry for the slow response - running on an old VAX)

    The PARAMETERS DISABLE CHECKS command enables you to override
    minimum and maximum values established for system parameters.
    SYSMAN does parameter checks by default. If you attempt to
    set parameter values outside the allowable limits when checks
    are enabled, the operating system issues an error message. By
    disabling checks you can set parameter values regardless of the
    minimum and maximum limits.

                                   NOTE

       Range checks are enabled by default because Compaq suggests
       that systems operate within these minimum and maximum
       values. Setting parameters outside these limits can result
       in system failures or hangs.