Updated

Updated · korben.info · Apr 11

Backblaze Reports 1.41% Q1 2024 Drive Failure Rate as 4 TB Retirements Cut Breakdowns

Updated

Updated · korben.info · Apr 11

Backblaze Reports 1.41% Q1 2024 Drive Failure Rate as 4 TB Retirements Cut Breakdowns

Q: Could a mere one-degree temperature increase be the hidden killer silently destroying your data storage drives?

A one-degree Celsius increase is not a silent “killer” by itself, but it is a measurable risk factor. A peer-reviewed analysis of 443,156 Backblaze-tracked enterprise hard drives found that each 1°C rise in average operating temperature increased failure rates by about 2.1% after controlling for age, capacity, form factor, and other variables. Over a 10°C rise, that compounds to roughly 23%. That matters, but temperature is only one part of the picture. Backblaze’s own Q1 2024 report showed overall reliability improving, with the annualized failure rate falling to 1.41% from 1.53%, mainly because older 4 TB drives were being retired. The biggest reliability differences were tied to specific models and drive age, not temperature alone. Some drives had zero failures in the quarter, while one Seagate 12 TB model posted an annualized failure rate near 13%. The evidence suggests heat can nudge drives toward failure, especially over time, but it is rarely the sole cause. Hard drives tend to follow the “bathtub curve,” with more failures early in life and again as they age. Brand, model, workload, cooling, and drive generation all matter. The practical takeaway is simple: keep drives within rated temperatures, ensure good airflow, and monitor SMART data, but do not assume a 1°C bump will suddenly destroy your data. The larger risk is letting drives run consistently hotter while also ignoring model-specific reliability and backups. Temperature control helps; backups remain essential.

1 articles · Updated · korben.info · Apr 11

Backblaze’s overall hard-drive annualized failure rate fell to 1.41% in Q1 2024 from 1.53% in the prior quarter, based on fleet data from its cloud-storage datacenters.
4 TB drive retirements drove much of the improvement: that segment’s AFR dropped to 1.36% from 2.33% as older units were phased out and replaced largely with 16 TB drives.
Three Seagate models posted zero failures in the quarter, including 16 TB ST16000NM002J and 8 TB ST8000NM000A, while the 6 TB ST6000DX000 stood out after about nine years of service.
Seagate’s 12 TB ST12000NM0007 was the weakest model, with an AFR near 13%; several other Seagate, Toshiba and HGST models also topped 3.5%.
Average age at failure rose to 2 years 10 months from 2.5 years in 2023, an encouraging sign even as Backblaze separately benched 275 overheated drives and tracked 641 units with limited data.