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research
A hard drive reliability check on 341,263 drives, from 4TB to past 20TB
Backblaze released a Q1 2026 reliability report covering 341,263 hard drives ranging from 4TB to over 20TB capacity in its cloud storage fleet. The analysis tracks real-world failure rates across a diverse range of drive sizes operating in continuous-use conditions, excluding boot drives and units below reporting thresholds.
Why it matters: Infrastructure teams and procurement managers selecting bulk storage hardware should review manufacturer and capacity-specific failure rates to optimize reliability and cost in their own deployments.
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