mmm gg...gg NN...NN XX...XX YY...YY ZZ...ZZ

mmm: MCF identifier

gg...gg: Buffer group number

NN...NN: Number of buffers

XX....XX: Number of buffer in use

YY...YY: Number of extended buffers

ZZ....ZZ: Number of extended buffer in use

S: Displays the usage status of buffers.