In one embodiment, a network device in a network obtains {HEAD ~ information} identifying first storage and {TAIL ~ second storage} 
In one embodiment , a network device in a network obtains { HEAD ~ information } identifying first storage and { TAIL ~ second storage }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD REL OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL