receiving {HEAD ~ Small Computer System Interconnect} commands from {TAIL ~ the custom interface} when the SCSI commands are to be sent out over the FC link 
receiving { HEAD ~ Small Computer System Interconnect } commands from { TAIL ~ the custom interface } when the SCSI commands are to be sent out over the FC link
OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH