In a particular implementation, at block 450, metadata associated with {HEAD ~ the information} being written to {TAIL ~ NAND memory} may be written to PCM in a parallel process 
written to
In a particular implementation , at block 450 , metadata associated with { HEAD ~ the information } being written to { TAIL ~ NAND memory } may be written to PCM in a parallel process
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH