Unverified90% confidenceCautionTime unknown

不要用SMR叠瓦式硬盘做监控存储，SMR随机写入性能差，多路连续写入易掉帧或录像卡顿，务必选CMR垂直式；监控专用盘基本为CMR

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90%

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Long-term

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监控硬盘category

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Unverified监控硬盘必须选择CMR（垂直磁记录）盘，绝对不能用SMR（叠瓦式）盘。SMR盘在7×24小时连续写入时会因缓存写满导致掉帧丢录像，西数紫盘WD Purple全系为CMR86% similar Unverified叠瓦式(SMR)硬盘不适合作为NAS组RAID或频繁写入盘，随机写入时会因重叠磁道重写导致性能雪崩；NAS和存储密集场景必须选垂直式(CMR)硬盘79% similar

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