While {HEAD ~ these changes} are in {TAIL ~ progress}, the disk array remains on line and most host data is available for access and modification 
are in
While { HEAD ~ these changes } are in { TAIL ~ progress } , the disk array remains on line and most host data is available for access and modification
OTH HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH