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