(Alpha and Integrity servers) FAST_PATH_PORTS is a static
    parameter that deactivates Fast Path for specific drivers.

    FAST_PATH_PORTS is a 32-bit mask, with a bit assigned for each
    Fast Path port driver. The following table describes the bit
    values:

    Bit
    Value    Description

    1        Indicates that Fast Path is disabled for ports serviced
             by the corresponding driver.

    0        Indicates that Fast Path is not disabled for ports
             serviced by the corresponding driver.

    Beginning in OpenVMS Version 7.3-1, values of specific bit
    positions are those described in the following table:

    Bit
    Position Description

    0        Controls Fast Path for PKQDRIVER (for parallel SCSI).

    1        Controls Fast Path for FGEDRIVER (for Emulex LP7000,
             LP8000, LP9002, LP9802, LP10000 FibreChannel).

    2        Controls Fast Path for PKADRIVER (for Adaptec AIC-78xx
             Ultra3 SCSI).

    3        Controls Fast Path for PEDRIVER (for LAN).

    4        Controls Fast Path for PKRDRIVER (for SMART Array 5300).

    5        Controls Fast Path for PKMDRIVER, the LSI Logic
             LSI53C1030 SCSI port driver.

    6        Controls Fast Path for PGQDRIVER, the Qlogic ISP23xx
             FibreChannel port driver.

    Currently, the default setting for FAST_PATH_PORTS is 0, which
    means that Fast Path is enabled for all drivers that appear in
    the table.

    In addition, note the following:

    o  CI drivers are not controlled by FAST_PATH_PORTS. Fast Path
       for CI is enabled and disabled exclusively by the FAST_PATH
       system parameter.

    o  FAST_PATH_PORTS is relevant only if the FAST_PATH system
       parameter is enabled (equal to 1). Setting FAST_PATH to zero
       has the same effect as setting all the bits in FAST_PATH_PORTS
       to 1.

    For additional information, see FAST_PATH. For an explanation of
    how to set the bits, see the OpenVMS I/O User's Reference Manual.