Unverified95% confidenceDecision RuleTime unknown
RAID 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/JBOD
1
Sources
95%
Confidence
Long-term
Relevance
-
First Seen
Sources
Related Entities
Related Claims
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91% similarUnverifiedRAID 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 689% 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86% similarUnverifiedRAID冗余提高数据安全但牺牲有效容量：RAID5损失1块盘容量，RAID1直接减半，纯循环覆盖的普通监控用JBOD/单盘更划算，被覆盖的旧录像本无保留价值84% similarUnverifiedRAID 5 at full 4-bay capacity with 6TB drives can provide approximately 18TB of usable space (4×6TB minus one drive's parity)80% similar
Cite This Claim
Stable URI
https://kongchang.com/claim/241354API
curl https://kongchang.com/api/v1/knowledge/claims/241354MCP
get_claim(id=241354)