MSCP_CREDITS specifies the number of outstanding I/O requests
    that can be active from one client system. Each credit is
    associated with an MSCP Buffer, which resides in S0/S1 system
    address space. The default value is 32.

    Unless a system has insufficient S0/S1 virtual address space
    available due to the specific system configuration,
    VSI recommends that this value not be decreased.