During RAID reconstruction, how is I/O performance typically affected?

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Multiple Choice

During RAID reconstruction, how is I/O performance typically affected?

Explanation:
During RAID reconstruction, the data rebuild process actively accesses the remaining drives to recreate the missing data and parity. This adds extra I/O workload, so the controller must share I/O bandwidth between normal host operations and the rebuild, resulting in higher latency and lower throughput for application I/O. In short, I/O performance typically decreases during rebuild. It won't double, won't remain exactly the same, and it won't drop to zero—the system continues servicing I/O, but with degraded performance due to contention and parity calculations.

During RAID reconstruction, the data rebuild process actively accesses the remaining drives to recreate the missing data and parity. This adds extra I/O workload, so the controller must share I/O bandwidth between normal host operations and the rebuild, resulting in higher latency and lower throughput for application I/O. In short, I/O performance typically decreases during rebuild. It won't double, won't remain exactly the same, and it won't drop to zero—the system continues servicing I/O, but with degraded performance due to contention and parity calculations.

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