Author: Stan Eisenstat
Subject: Re: [Cs323] Parity Block
Date: Saturday, 10 Oct 2020, 09:15:58

    > Message Posted By: Unknown
    >
    > How is the parity block in RAID4/5 actually able to correct the error?
    > Isn't this equivalent to one parity bit, which can only detect single-bit
    > errors?

Think of each disk as storing only one bit.  The bit on
the parity disk was chosen so that the set of bits has
odd parity.  If one disk is lost, its bit can be restored
by imposing odd parity on the set.

--Stan-