Backblaze's 2025 Year-End Drive Stats Report provides an in-depth analysis of hard drive failure rates for Q4, the full year, and lifetime performance across its data center fleet.

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Backblaze's 2025 Drive Stats report reveals an annual failure rate of 1.36%, down from 1.55% in 2024—the lowest since 2022. The analysis covers 337,192 hard drives across Q4 2025, the full year, and lifetime data. Notable findings include the introduction of WDC's first 26TB drive with strong early performance, investigation into elevated failure rates for aging HGST 8TB drives (10.29% AFR) attributed to potential vibration sensitivity, and successful normalization of Toshiba 16TB drives after firmware updates. The fleet continues shifting toward high-capacity drives, with 14-16TB models comprising 52% of the total and 20TB+ drives reaching nearly 23%.

Backblaze Drive Stats for 2025

Defining the relationship, aka setting some boundaries

Comparing Drive Stats for 2023, 2024, and 2025