The CSA primary device then selects the storage arrays and creates {HEAD ~ the logical data volume} across {TAIL ~ the selected storage} arrays by configuring each of the selected storage arrays for a portion of the logical data volume 
across
The CSA primary device then selects the storage arrays and creates { HEAD ~ the logical data volume } across { TAIL ~ the selected storage } arrays by configuring each of the selected storage arrays for a portion of the logical data volume
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH