Backblaze Reports Improved Drive Reliability as Fleet Shifts to Higher Capacity
Event summary
- Backblaze's 2025 Year-End Drive Stats report analyzed 344,196 hard drives across 30 models.
- The annualized failure rate (AFR) improved to 1.36% in 2025 from 1.55% in 2024.
- Q4 2025 posted an even stronger quarterly AFR of 1.13%.
- High-capacity drives (14–16TB) now account for 52% of active drives, with 20TB+ models at nearly 23%.
- Backblaze deployed its first 26TB drive this quarter.
The big picture
Backblaze's shift toward higher-capacity drives reflects broader industry trends in cost per gigabyte reduction and increasing storage density demands. The improved failure rates suggest effective fleet management, which is critical for supporting AI and neocloud workloads. As data centers increasingly rely on high-capacity solutions, Backblaze's operational insights become more valuable for the storage community.
What we're watching
- Capacity Trends
- The pace at which Backblaze adopts higher-capacity drives will impact storage density and cost efficiency.
- Reliability Metrics
- Whether the improved AFR can be sustained as new, larger-capacity drives are integrated into the fleet.
- Industry Shifts
- How declining availability of smaller enterprise drives affects Backblaze's procurement strategy and operational flexibility.