Difference between parity and ecc?

Discussion in 'Computer Help' started by jasonlee123, Jul 29, 2001.

  1. jasonlee123

    jasonlee123 Member

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    I know parity is older technology and its crap, but if they both check for errors, then what is the difference?
     
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  3. Mday

    Mday Lifer

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    parity has an extra bit for every byte. so each chip has an amount of bits divisible by 9, as opposed to 8.

    ecc modules have a "9th" chip as opposed to an extra bit.

    --

    parity is capable of catching single bit errors.

    ecc is capable of FIXING single bit errors, and reporting multibit errors.
     
  4. Superwormy

    Superwormy Golden Member

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    Parity just checks for errors and finds them - 1 extra bit
    ECC attempts to repair the errors as well - 8 extra bits

    Something like that...
     
  5. Saltin

    Saltin Platinum Member

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    Yeah, parity uses a checksum to make sure the data in memory is not corrupted, if it is it cannot fix it. ECC employs a RAID 5 like philosiphy. Even if there is a certain level of corruption, it is possible to fix it