As a result, at block 420, the FTL may determine a free portion of NAND memory in which to write {HEAD ~ information} of {TAIL ~ the write request} 
As a result , at block 420 , the FTL may determine a free portion of NAND memory in which to write { HEAD ~ information } of { TAIL ~ the write request }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL