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