Most personal computers today (at least 8086 family based) use neither parity or ECC (Error Correcting Code) memory. (Even worse, some systems use a fake parity chip that sends back the correct parity bit even if there is an error in memory.)

• most PCs have no means of detecting memory errors
• memory errors will occur (there are statistical calculations to predict how frequently they might occur, and, admittedly, the frequencies are low)

Thus, if you plan to keep data correct for the next 1000 years (not unreasonable, for some things), you should consider (real) parity or ECC memory.

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• AboutThesePages

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• () RandyKramer - 29 Mar 2003
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