Backblaze Reports Q3 2025 Drive Failure Rate of 1.55% with High-Capacity Drives Growing to 21% of Fleet

Reuters11-11

Backblaze Reports Q3 2025 Drive Failure Rate of 1.55% with High-Capacity Drives Growing to 21% of Fleet

Backblaze Inc. released its Q3 2025 Drive Stats report, analyzing the performance and reliability of 328,348 hard drives across its global data centers. The report noted an increase in the quarterly failure rate to 1.55%, up from 1.36% in Q2, aligning with the 2024 annualized failure rate (AFR) of 1.57%. The lifetime AFR remained steady at 1.31%. High-capacity drives (20TB and above) grew by nearly 8,000 units and now represent 21% of the active drive pool. Four drive models recorded zero failures during the quarter, including the Seagate HMS5C4040BLE640 (4TB), Seagate ST8000NM000A (8TB), Toshiba MG09ACA16TE (16TB), and Toshiba MG11ACA24TE (24TB). The report also highlighted an outlier, the Toshiba MG08ACA16TEY (16TB), which showed a 16.95% AFR due to temporary removals related to ongoing upgrades, not mechanical issues, with expectations for normalization in future reports.

Disclaimer: This news brief was created by Public Technologies (PUBT) using generative artificial intelligence. While PUBT strives to provide accurate and timely information, this AI-generated content is for informational purposes only and should not be interpreted as financial, investment, or legal advice. Backblaze Inc. published the original content used to generate this news brief via Business Wire (Ref. ID: 20251111306009) on November 11, 2025, and is solely responsible for the information contained therein.

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The report noted an increase in the quarterly failure rate to 1.55%, up from 1.36% in Q2, aligning with the 2024 annualized failure rate  of 1.57%. The lifetime AFR remained steady at 1.31%. High-capacity drives  grew by nearly 8,000 units and now represent 21% of the active drive pool. Four drive models recorded zero failures during the quarter, including the Seagate HMS5C4040BLE640 , Seagate ST8000NM000A , Toshiba MG09ACA16TE , and Toshiba MG11ACA24TE . The report also highlighted an outlier, the Toshiba MG08ACA16TEY , which showed a 16.95% AFR due to temporary removals related to ongoing upgrades, not mechanical issues, with expectations for normalization in future reports.Disclaimer: This news brief was created by Public Technologies  using generative artificial intelligence. 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