At block 440, such ECC may be written to a spare area of NAND memory while associated information may be written to {HEAD ~ a main area} of {TAIL ~ NAND memory} 
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At block 440 , such ECC may be written to a spare area of NAND memory while associated information may be written to { HEAD ~ a main area } of { TAIL ~ NAND memory }
OTH 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 HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL