Unverified90% confidenceDecision RuleTime unknown
RAID 5至少需要3块盘，可用容量为(N-1)×单盘容量，容忍1块盘故障；但重建时对剩余盘的持续读取压力极大，8TB以上单盘用RAID 5存在重建期二次掉盘风险，建议改用RAID 6
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90%
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Long-term
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UnverifiedRAID 5至少需要3块硬盘，可容忍1块盘故障，容量利用率为(N-1)/N；RAID 6需要至少4块盘，可容忍2块盘同时故障，适合8盘位以上大容量阵列以规避重建期二次故障风险95% similarUnverifiedRAID5至少需要3块盘、RAID6至少需要4块盘、RAID10需要偶数块且最少4块；单盘容量≥8TB时应优先选RAID6而非RAID5，因大盘重建时间长，重建期间再坏一盘会全阵列崩溃93% similarUnverifiedRAID 5 需要至少3块盘且损失1块盘容量做校验，4盘位是RAID 5的性价比甜点（可用容量75%且能容忍单盘故障）；2盘位设备无法组RAID 5，只能选RAID 0/1/JBOD89% similarUnverified单盘容量≥8TB时优先选RAID 6而非RAID 5，因为大容量盘重建时间可达数十小时，重建期间阵列处于降级状态，此时若第二块盘故障将导致RAID 5全盘数据丢失83% similarUnverifiedRAID 5 at full 4-bay capacity with 6TB drives can provide approximately 18TB of usable space (4×6TB minus one drive's parity)83% similar
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