Unverified85% confidenceDecision RuleTime unknown
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
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85%
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Long-term
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Unverified首次购入NAS且以照片/文档备份、影音串流为主，选4盘位比2盘位更合理：2盘位组RAID1后仅剩单盘容量且无法平滑扩容，4盘位可组RAID5兼顾容量利用率与冗余89% similarUnverified选购NAS盘位数量时，2盘位适合影音备份等轻度需求（RAID1提供容错），4盘位是家庭多媒体+多用户场景的甜点区，可组RAID5兼顾容量与冗余；家庭用户超过6盘位往往过度投资81% similarUnverified选择NAS盘位数应遵循'N+1'原则：实际存储需求所需盘数量再加1块作为冗余盘。例如需要2块盘容量则至少选4盘位，为SHR/RAID5/RAID6扩容和容错留余量81% similar
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