The HyperCP collaboration (FNAL E871) has constructed a high
speed data acquisition system which was used during the 1999 fixed target
program at the Fermi National Accelerator Laboratory to collect
approximately 80 tera-bytes of data recorded on approximately 19,000
Exabyte 8mm tapes.  The average instantaneous rate of data generation was
36 mega-bytes per second from 21,000 input channels.  Data was written to
tape at a sustained rate of 27 mega-bytes per second.  The design and
operation of this DAQ system will be discussed.