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What is Understanding Parity in RAID Systems about?

This document discusses parity and how it is used in RAID arrays as an alternative to mirroring for data protection. Parity involves calculating redundant parity information from the data values that allows any single lost piece of data to be reconstructed. Parity is calculated using the exclusive OR (XOR) operation, which "undoes itself" when performed twice in a row. This property allows the missing data to be reconstructed by XORing the remaining data and parity values. Compared to mirroring, parity has

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