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<p>unit of storage due to the higher data density, and memory-reading software can compensate for a larger <a href="page.php?w=bit_error_rate">bit error rate</a>. The higher error rate necessitates an <a href="page.php?w=error-correcting_code">error-correcting code</a> (ECC) that can correct multiple bit errors; for example, the <a href="page.php?w=SandForce">SandForce</a> SF-2500 flash controller can correct up to 55&nbsp;bits per 512-byte sector with an unrecoverable read error rate of less than one sector per 10<sup>17</sup>&nbsp;bits read. The</p><p>
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