In another example, {HEAD ~ simple re replication} requires {TAIL ~ less write Input/Output operations} than complete out migration, and is therefore a faster way to restore data redundancy 
In another example , { HEAD ~ simple re replication } requires { TAIL ~ less write Input / Output operations } than complete out migration , and is therefore a faster way to restore data redundancy
OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH