The user, through a host device, issues {HEAD ~ a command} to {TAIL ~ the CSA} to create the logical data volume 
to
The user , through a host device , issues { HEAD ~ a command } to { TAIL ~ the CSA } to create the logical data volume
OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH