Backblaze drive stats for Q2 2026
Backblaze's Q2 2026 drive stats report monitors over 354,000 hard drives, noting a quarterly annualized failure rate of 1.73% and exploring future SMR storage trade-offs.
summary is enough The standard quarterly metrics and high-level SMR overview can be parsed quickly from the summary and tables without reading every line.
summary
Backblaze published its Q2 2026 drive stats, analyzing 354,415 active hard drives and reporting a quarterly annualized failure rate (AFR) of 1.73%, a slight uptick from previous quarters. The report details lifetime failure metrics across major manufacturers while highlighting that high-capacity drives above 20TB now comprise over a quarter of the fleet. Additionally, the company examines the architectural differences between CMR and Shingled Magnetic Recording (SMR) as a potential pathway for denser future deployments.
key points
- Backblaze tracked 354,415 active hard drives in Q2 2026, resulting in a quarterly annualized failure rate (AFR) of 1.73%.
- High-capacity drives of 20TB and above now represent more than 25% of the total fleet.
- Several specific Seagate models recorded zero failures during the quarter, while older units drove up the outlier failure rates.
who should read it
Systems administrators and infrastructure engineers tracking enterprise hard drive reliability and failure trends.
discussion positive
consensus
Commenters appreciate the historical perspective showing massive multi-decade improvements in drive lifespan, though many express frustration over current high pricing and poor retail availability of large drives.
pushback
A few technical commenters criticize the quarterly AFR methodology for mixing drives of varying ages without age-controlled survival curves.
In 2013 Backblaze saw ~14% avg failure rate at 3 years 3 months. Drive useful life: 4 years, roughly.
In 2021, Backblaze saw ~14% failure rate at 7 years 9 months. Drive useful life: about 6 years.
That gave us what was a stable-seeming, old "replace drives at 5 years, or you're getting risky" rule of thumb (unless you prefer to replace on failure, of course).
In 2025, Backblaze saw ~5% failure rate at 10 years 3 months. Drive useful life: ~10 years, roughly!
Thanks for all the HDD improvements, industry!
It maps out the dramatic macro trend in hard drive reliability over the last decade, showing that expected useful life has jumped from four years to over ten years.
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