The optical storage medium 4, wherein said {HEAD ~ second reflective layer} includes said {TAIL ~ metal alloy} 
The optical storage medium 4 , wherein said { HEAD ~ second reflective layer } includes said { TAIL ~ metal alloy }
OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL OTH TAIL TAIL TAIL TAIL TAIL TAIL