Caught failing drives 39 days before failure across a production fleet of 9,096 hard drives.
Each drive watched against its own baseline. The system flagged drives drifting toward failure without ever being shown what failure looks like — beating the best published result on this fleet, which used trained models with labelled failure history. We used none.
Backblaze production fleet data · 92.3% precision · 39-day average lead time · independently auditable


