Unverified95% confidenceDecision RuleTime unknown

2盘位配置下若使用SHR/RAID1做冗余保护，实际可用容量仅为单块硬盘容量；若追求大容量又要冗余，应考虑4盘位机型

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95%

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Unverified4盘位组RAID 5可获得约3块硬盘的有效容量并允许1块硬盘故障，是该机型下存储效率与冗余的常见平衡方案；若需要更高容错应考虑RAID 6或SHR-2但可用容量会进一步减少88% similar Unverified首次购买NAS建议直接选4盘位而非2盘位，2盘位RAID1只能镜像浪费一半容量且无扩展余地，4盘位可组RAID5/SHR只损失一块盘容量，长期性价比更高82% similar

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