The data migration software 136 calls the volume creation software 130 to determine {TAIL ~ a new combination} of storage space in the storage devices 102 to 108 of the storage arrays 114 to 120 for logical data volume 174 that will best fit, or evenly distribute, the current data transfer loads of {HEAD ~ the storage} arrays 114 to 120 
The data migration software 136 calls the volume creation software 130 to determine { TAIL ~ a new combination } of storage space in the storage devices 102 to 108 of the storage arrays 114 to 120 for logical data volume 174 that will best fit , or evenly distribute , the current data transfer loads of { HEAD ~ the storage } arrays 114 to 120
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH