A log is provided at {HEAD ~ each individual scanning entity} for storing {TAIL ~ locally constructed printhead defect models} and printhead defect models that have been constructed at other scanning entities in the network 
A log is provided at { HEAD ~ each individual scanning entity } for storing { TAIL ~ locally constructed printhead defect models } and printhead defect models that have been constructed at other scanning entities in the network
OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH