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