When used with the /POOL and /CACHE qualifiers, displays
    additional information. This qualifier is ignored otherwise.
    For /CACHE, the additional information is only displayed when
    the Virtual I/O Cache facility is in use (Alpha only); /FULL is
    ignored if the Extended File Cache facility is in use. Additional
    information on how memory is being used by the Extended File
    Cache facility can be obtained using the XFC extension described
    in Chapter 9.