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