
Fundamentals of Flash Memory and Other Solid State Memory Technologies 83
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4.5 Bit Errors in NAND Flash
As mentioned earlier, NAND was designed to replace hard disk drives. The inventors
realized that the hard disk drive’s innovators had come up with a lot of good ideas, and
borrowed some of those ideas to further drive costs down for NAND.
One very important similarity is the handling of bit errors. The serial technology in
NAND is very prone to bit errors, something that digital systems cannot tolerate. In
order to get past this, NAND makers used error correction technology common to the
hard disk drive business, for instance ...