Block-level distributed parity, Computer Engineering

Given a RAID 5 (block-level distributed parity) with k disks, how well will large block trnsmitted work? How well will it handle a high I/O request rate? Evaluate the performance to a single disk. Give the formula in terms of k. If the read performance is dissimilar from write,
then give separate formulas. What is its capacity (compared to a one disk)?

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