{TAIL ~ The data} are migrated into RAID 5 configurations as a background operation, to minimize {HEAD ~ the disk space} lost 
{ TAIL ~ The data } are migrated into RAID 5 configurations as a background operation , to minimize { HEAD ~ the disk space } lost
TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH