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We describe and evaluate a strategy for declustering the parity encoding in a redundant disk array. This declustered parity organization balances cost against data reliability and performance during failure recovery in highly-available parity-based arrays for use in continuous-operation systems. It improves on standard parity organizations by reducing the additional load on surviving disks during the reconstruction of a failed disk's contents. This yields higher user throughput during recovery,doi:10.1145/143371.143383 fatcat:urrlktxcjbfojnytr5lgeel4by