>>> Tom Lane <[EMAIL PROTECTED]> wrote: > Paul Schlie <[EMAIL PROTECTED]> writes: >> - yes, if you're willing to compute true CRC's as opposed to simpler >> checksums, which may be worth the price if in fact many/most data >> check failures are truly caused by single bit errors somewhere in the >> chain, > > FWIW, not one of the corrupted-data problems I've investigated has ever > looked like a single-bit error. So the theoretical basis for using a > CRC here seems pretty weak. I doubt we'd even consider automatic repair > attempts anyway. +1 The only single-bit errors I've seen have been the result of a buggy driver for a particular model of network card. The problem went away with the next update of the driver. I've never encountered a single-bit error in a disk sector. -Kevin
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