{HEAD ~ The storage devices} are distributed across {TAIL ~ the processors} to store titles, where each title is divided into data chunks that are distributed across the storage devices 
{ HEAD ~ The storage devices } are distributed across { TAIL ~ the processors } to store titles , where each title is divided into data chunks that are distributed across the storage devices
HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH