configuring the selected storage arrays for {HEAD ~ storage spaces} for the logical data volume, the storage spaces of each selected storage array containing {TAIL ~ a portion} of the logical data volume 
configuring the selected storage arrays for { HEAD ~ storage spaces } for the logical data volume , the storage spaces of each selected storage array containing { TAIL ~ a portion } of the logical data volume
OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH