The system hides configuration changes necessary for {HEAD ~ the addition} and removal of disks to/from {TAIL ~ the disk array} by unstriping data, adding or deleting a disk and then restriping data over all the disks 
to
The system hides configuration changes necessary for { HEAD ~ the addition } and removal of disks to / from { TAIL ~ the disk array } by unstriping data , adding or deleting a disk and then restriping data over all the disks
OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH REL 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