Does parity RAM reliably report on it's reliability?
Nope. At least if you're talking about parity memory on FPM or EDO DRAM, which only has a fifty-fifty chance of even noticing an error, and a 1/9 (~11%) chance of reporting an error with the parity bit itself.
Modern SDRAM and DDR memory with ECC will reliably detect and correct single-bit errors, will reliably detect two-bit errors, and even has a very good shot (~90+%?) of detecting larger multibit errors.
-- -Chuck
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